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Электронный компонент: W83627HF

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W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 1 - Revision 1.0
GENERAL DESCRIPTION
The W83627HF and W83627F are evolving product from Winbond's most popular I/O family. They
feature a whole new interface, namely LPC (
Low Pin Count
) interface, which will be supported in the
next generation Intel chip-set. This interface as its name suggests is to provide an economical
implementation of I/O's interface with lower pin count and still maintains equivalent performance as its
ISA interface counterpart. Approximately 40 pin counts are saved in LPC I/O comparing to ISA
implementation. With this additional freedom, we can implement more devices on a single chip as
demonstrated in W83627F/HF's integration of Game Port and MIDI Port. It is fully transparent in terms of
software which means no BIOS or device driver update is needed except chip-specific configuration.
The disk drive adapter functions of W83627F/HF include a floppy disk drive controller compatible with the
industry standard 82077/ 765, data separator, write pre-compensation circuit, decode logic, data rate
selection, clock generator, drive interface control logic, and interrupt and DMA logic. The wide range of
functions integrated onto the W83627F/HF greatly reduces the number of components required for
interfacing with floppy disk drives. The W83627F/HF supports four 360K, 720K, 1.2M, 1.44M, or 2.88M
disk drives and data transfer rates of 250 Kb/s, 300 Kb/s, 500 Kb/s,1 Mb/s, and 2 Mb/s.
The W83627F/HF provides two high-speed serial communication ports (UARTs), one of which supports
serial Infrared communication. Each UART includes a 16-byte send/receive FIFO, a programmable
baud rate generator, complete modem control capability, and a processor interrupt system. Both
UARTs provide legacy speed with baud rate up to 115.2k bps and also advanced speed with baud rates
of
230k
,
460k
, or
921k bps
which support higher speed modems. In addition, the W83627F/HF provides
IR functions:
IrDA 1.0
(
SIR
for 1.152K bps) and TV remote IR (
Consumer IR
, supporting NEC, RC-5,
extended RC-5, and RECS-80 protocols).
The W83627F/HF supports one PC-compatible printer port (SPP), Bi-directional Printer port (BPP) and
also Enhanced Parallel Port (EPP) and Extended Capabilities Port (ECP). Through the printer port
interface pins, also available are: Extension FDD Mode and Extension 2FDD Mode allowing one or two
external floppy disk drives to be connected.
The configuration registers support mode selection, function enable/disable, and power down function
selection. Furthermore, the configurable PnP features are compatible with the plug-and-play feature
demand of Windows 95/98
TM
, which makes system resource allocation more efficient than ever.
The W83627F/HF provides functions that complies with
ACPI
(
Advanced Configuration and Power
Interface
), which includes support of legacy and ACPI power management through
PME#
or
PSOUT#
function pins. For OnNow keyboard Wake-Up, OnNow mouse Wake-Up, and OnNow CIR Wake-Up.
The W83627F/HF also has auto power management to reduce the power consumption.
The keyboard controller is based on 8042 compatible instruction set with a 2K Byte programmable ROM
and a 256-Byte RAM bank. Keyboard BIOS firmware are available with optional AMIKEY
TM
-
2, Phoenix
MultiKey/42
TM
, or customer code.
The W83627F/HF provides a set of flexible I/O control functions to the system designer through a set of
General Purpose I/O ports. These GPIO ports may serve as simple I/O or may be individually configured
to provide a predefined alternate function. General Purpose Port 1 is designed to be functional even in
power down mode (VCC is off).
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 2 - Revision 1.0

The W83627F/HF is made to fully comply with
Microsoft PC98 and PC99 Hardware Design Guide
.
Moreover W83627F/HF is made to meet the specification of PC98/PC99's requirement in the power
management:
ACPI
and
DPM
(Device Power Management).
The W83627F/HF contains a game port and a MIDI port. The game port is designed to support 2
joysticks and can be applied to all standard PC game control devices, They are very important for a
entertainment or consumer computer.
Only the W83627HF support hardware status monitoring
for personal computers. It can be used to
monitor several critical hardware parameters of the system, including power supply voltages, fan speeds,
and temperatures, which are very important for a high-end computer system to work stably and properly.

FEATURES
General
Meet LPC Spec. 1.0
Support LDRQ#(LPC DMA), SERIRQ (serial IRQ)
Include all the features of Winbond I/O W83977TF and W83977EF
Integrate Hardware Monitor functions
Compliant with Microsoft PC98/PC99 Hardware Design Guide
Support DPM (Device Power Management), ACPI
Programmable configuration settings
Single 24 or 48 MHz clock input
FDC
Compatible with IBM PC AT disk drive systems
Variable write pre-compensation with track selectable capability
Support vertical recording format
DMA enable logic
16-byte data FIFOs
Support floppy disk drives and tape drives
Detects all overrun and underrun conditions
Built-in address mark detection circuit to simplify the read electronics
FDD anti-virus functions with software write protect and FDD write enable signal (write data
signal was forced to be inactive)
Support up to four 3.5-inch or 5.25-inch floppy disk drives
Completely compatible with industry standard 82077
360K/720K/1.2M/1.44M/2.88M format; 250K, 300K, 500K, 1M, 2M bps data transfer rate
Support
3-mode FDD, and its Win95/98 driver
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 3 - Revision 1.0
UART
Two high-speed 16550 compatible UARTs with 16-byte send/receive FIFOs
MIDI compatible
Fully programmable serial-interface characteristics:
--- 5, 6, 7 or 8-bit characters
--- Even, odd or no parity bit generation/detection
--- 1, 1.5 or 2 stop bits generation
Internal diagnostic capabilities:
--- Loop-back controls for communications link fault isolation
--- Break, parity, overrun, framing error simulation
Programmable baud generator allows division of 1.8461 MHz and 24 MHz by 1 to (2
16
-1)
Maximum baud rate up to
921k bps
for 14.769 MHz and 1.5M bps for 24 MHz
Infrared
Support IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps
Support SHARP ASK-IR protocol with maximum baud rate up to 57,600 bps
Support Consumer IR
Parallel Port
Compatible with IBM parallel port
Support PS/2 compatible bi-directional parallel port
Support Enhanced Parallel Port (EPP)
-
Compatible with IEEE 1284 specification
Support Extended Capabilities Port (ECP)
-
Compatible with IEEE 1284 specification
Extension FDD mode supports disk drive B; and Extension 2FDD mode supports disk drives A
and B through parallel port
Enhanced printer port back-drive current protection
Keyboard Controller
8042 based with optional F/W from AMIKKEY
TM
-2, Phoenix MultiKey/42
TM
or customer code
with 2K bytes of programmable ROM, and 256 bytes of RAM
Asynchronous Access to Two Data Registers and One status Register
Software compatibility with the 8042
Support PS/2 mouse
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 4 - Revision 1.0
Support port 92
Support both interrupt and polling modes
Fast Gate A20 and Hardware Keyboard Reset
8 Bit Timer/ Counter
Support binary and BCD arithmetic
6 MHz, 8 MHz, 12 MHz, or 16 MHz operating frequency
Game Port
Support two separate Joysticks
Support every Joystick two axis (X,Y) and two button (A,B) controllers
MIDI Port
The baud rate is 31.25 Kbaud
16-byte input FIFO
16-byte output FIFO
General Purpose I/O Ports
22 programmable general purpose I/O ports
General purpose I/O ports can serve as simple I/O ports, interrupt steering inputs, watch dog
timer output, power LED output, infrared I/O pins, KBC control I/O pins, suspend LED output,
RSMRST# signal, PWROK signal, Beep output
Functional in power down mode (GP1 only)
OnNow Functions
Keyboard Wake-Up by programmable keys
Mouse Wake-Up by programmable buttons
CIR Wake-Up by programmable keys
On Now Wake-Up from all of the ACPI sleeping states (S1-S5)
Hardware Monitor Functions ( Only for W83627HF)
5 VID input pins for CPU Vcore identification
3 thermal inputs from optionally remote thermistors or 2N3904 transistors or Pentium
TM
II
(Deschutes) thermal diode output
7 positive voltage inputs (typical for +12V, -12V, +5V, -5V, +3.3V, VcoreA, VcoreB)
2 intrinsic voltage monitoring (typical for Vbat, +5VSB)
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 5 - Revision 1.0
3 fan speed monitoring inputs
2 fan speed control
Build in Case open detection circuit
WATCHDOG comparison of all monitored values
Programmable hysteresis and setting points for all monitored items
Over temperature indicate output
Automatic Power On voltage detection Beep
Issue SMI#, IRQ, OVT# to activate system protection
Intel LDCM
TM
/ Acer ADM
TM
compatible
Package
128-pin PQFP
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 6 - Revision 1.0
PIN CONFIGURATION FOR 627F
1 2 3 4 5 6 7 8 9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
V
B
A
T
KDAT
KCLK
VSB
KBRST
A20GATE
KBLOCK#
RIA#
DCDA#
VSS
SOUTA
SINA
DTRA#
RTSA#
DSRA#
CTSA#
VCC
STB#
AFD#
ERR#
INIT#
SLIN#
PD0
PD1
PD2
PD3
40
39
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
VCC
GPSA2/GP17
GPSB2/GP16
GPY1/GP15
GPY2/P16/GP14
GPX2/P15/GP13
GPX1/P14/GP12
1
0
2
1
0
1
1
0
0
9
9
9
8
9
7
9
6
9
5
9
4
9
3
9
2
9
1
9
0
8
9
8
8
8
7
8
6
8
5
8
4
8
3
8
2
8
1
8
0
7
9
7
8
7
7
7
6
7
5
7
4
7
3
7
2
7
1
7
0
6
9
6
8
6
7
6
6
6
5
GPSB1/P13/GP11
VSS
GPSA1/P12/GP10
G
P
2
1
G
P
2
2
I
R
R
X
/
G
P
2
5
I
R
T
X
/
G
P
2
6
R
I
B
#
D
C
D
B
#
V
S
S
S
O
U
T
B
S
I
N
B
D
T
R
B
#
R
T
S
B
#
D
S
R
B
#
C
T
S
B
#
V
C
C
W
D
T
O
/
G
P
2
4
S
L
P
_
S
X
/
G
P
3
0
P
L
E
D
/
G
P
2
3
P
W
R
C
T
L
#
/
G
P
3
1
SUSLED/GP35
R
S
M
R
S
T
#
/
G
P
3
3
P
W
R
O
K
/
G
P
3
2
C
I
R
R
X
/
G
P
3
4
P
S
I
N
P
S
O
U
T
#
M
D
A
T
M
C
L
K
S
U
S
C
L
K
I
N
A
V
C
C
A
G
N
D
P
C
I
C
L
K
L
D
R
Q
#
S
E
R
I
R
Q
L
A
D
3
L
A
D
2
L
A
D
1
L
A
D
0
V
C
C
3
V
L
F
R
A
M
E
#
V
C
C
L
R
E
S
E
T
#
P
M
E
#
C
L
K
I
N
D
R
V
D
E
N
0
D
R
V
D
E
N
1
/
S
M
I
#
/
G
P
2
7
I
N
D
E
X
#
M
O
A
#
D
S
B
#
D
S
A
#
V
S
S
M
O
B
#
D
I
R
#
S
T
E
P
#
W
D
#
W
E
#
T
R
A
K
0
#
W
P
#
R
D
A
T
A
#
H
E
A
D
#
D
S
K
C
H
G
#
S
L
C
T
P
E
B
U
S
Y
A
C
K
#
P
D
7
P
D
6
P
D
5
P
D
4
W83627F
MSI/GP20
MSO/IRQIN0
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
N
C
N
C
N
C
N
C
N
C
N
C
N
C
N
C
N
C
#

W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 7 - Revision 1.0
PIN CONFIGURATION FOR 627HF
1 2 3 4 5 6 7 8 9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
V
B
A
T
KDAT
KCLK
VSB
KBRST
A20GATE
KBLOCK#
RIA#
DCDA#
VSS
SOUTA
SINA
DTRA#
RTSA#
DSRA#
CTSA#
VCC
STB#
AFD#
ERR#
INIT#
SLIN#
PD0
PD1
PD2
PD3
40
39
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
V
R
E
F
V
T
I
N
3
VTIN2
VTIN1
OVT#
VID4
VID3
VID2
VID1
VID0
VCC
GPSA2/GP17
GPSB2/GP16
GPY1/GP15
GPY2/P16/GP14
GPX2/P15/GP13
GPX1/P14/GP12
1
0
2
1
0
1
1
0
0
9
9
9
8
9
7
9
6
9
5
9
4
9
3
9
2
9
1
9
0
8
9
8
8
8
7
8
6
8
5
8
4
8
3
8
2
8
1
8
0
7
9
7
8
7
7
7
6
7
5
7
4
7
3
7
2
7
1
7
0
6
9
6
8
6
7
6
6
6
5
GPSB1/P13/GP11
VSS
GPSA1/P12/GP10
FANPWM1
FANPWM2
FANIO1
FANIO2
FANIO3
S
C
L
/
G
P
2
1
S
D
A
/
G
P
2
2
I
R
R
X
/
G
P
2
5
I
R
T
X
/
G
P
2
6
R
I
B
#
D
C
D
B
#
V
S
S
S
O
U
T
B
S
I
N
B
D
T
R
B
#
R
T
S
B
#
D
S
R
B
#
C
T
S
B
#
V
C
C
W
D
T
O
/
G
P
2
4
S
L
P
_
S
X
/
G
P
3
0
P
L
E
D
/
G
P
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SUSLED/GP35
R
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-
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-
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W83627HF
BEEP
MSI/GP20
MSO/IRQIN0
#
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 8 - Revision 1.0
1. PIN DESCRIPTION
Note: Please refer to Section 13.2 DC CHARACTERISTICS for details.
I/O8t
- TTL level bi-directional pin with 8 mA source-sink capability
I/O12t
- TTL level bi-directional pin with 12 mA source-sink capability
I/O12tp3
- 3.3V TTL level bi-directional pin with 12 mA source-sink capability
I/OD12t
- TTL level bi-directional pin open drain output with 12 mA sink capability
I/O24t
- TTL level bi-directional pin with 24 mA source-sink capability
OUT12t
- TTL level output pin with 12 mA source-sink capability
OUT12tp3 - 3.3V TTL level output pin with 12 mA source-sink capability
OD12
- Open-drain output pin with 12 mA sink capability
OD24
- Open-drain output pin with 24 mA sink capability
INcs
- CMOS level Schmitt-trigger input pin
INt
- TTL level input pin
INtd
- TTL level input pin with internal pull down resistor
INts
- TTL level Schmitt-trigger input pin
INtsp3
- 3.3V TTL level Schmitt-trigger input pin

1.1 LPC Interface
SYMBOL
PIN
I/O
FUNCTION
CLKIN
18
IN
t
System clock input. According to the input frequency 24MHz or
48MHz, it is selectable through register. Default is 24MHz input.
PME#
19
OD
12
Generated PME event.
PCICLK
21
IN
tsp3
PCI clock input.
LDRQ#
22
O
12tp3
Encoded DMA Request signal.
SERIRQ
23
I/OD
12t
Serial IRQ input/Output.
LAD[3:0]
24-27 I/O
12tp3
These signal lines communicate address, control, and data
information over the LPC bus between a host and a peripheral.
LFRAME#
29
IN
tsp3
Indicates start of a new cycle or termination of a broken cycle.
LRESET#
30
IN
tsp3
Reset signal. It can connect to PCIRST# signal on the host.
SUSCLKIN
75
IN
ts
32khz clock input , for CIR only.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 9 - Revision 1.0
1.2 FDC Interface
SYMBOL
PIN
I/O
FUNCTION
DRVDEN0
1
OD
24
Drive Density Select bit 0.
DRVDEN1
2
OD
12
Drive Density Select bit 1. (Default)
SMI#
(IRQIN1)
GP27
In
t
I/OD
12
System Management Interrupt
(Interrupt channel input. For C version only)
General purpose I/O port 3 bit 6.
INDEX#
3
IN
cs
This Schmitt-triggered input from the disk drive is active low when
the head is positioned over the beginning of a track marked by an
index hole. This input pin is pulled up internally by a 1 K
resistor. The resistor can be disabled by bit 7 of L0-CRF0
(FIPURDWN).
MOA#
4
OD
24
Motor A On. When set to 0, this pin enables disk drive 0. This
is an open drain output.
DSB#
5
OD
24
Drive Select B. When set to 0, this pin enables disk drive B.
This is an open drain output.
DSA#
6
OD
24
Drive Select A. When set to 0, this pin enables disk drive A.
This is an open drain output.
MOB#
7
OD
24
Motor B On. When set to 0, this pin enables disk drive 1. This
is an open drain output.
DIR#
8
OD
24
Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion
STEP#
9
OD
24
Step output pulses. This active low open drain output produces a
pulse to move the head to another track.
WD#
10
OD
24
Write data. This logic low open drain writes pre-compensation
serial data to the selected FDD. An open drain output.
WE#
11
OD
24
Write enable. An open drain output.
TRAK0#
13
IN
cs
Track 0. This Schmitt-triggered input from the disk drive is active
low when the head is positioned over the outermost track. This
input pin is pulled up internally by a 1 K
resistor. The resistor
can be disabled by bit 7 of L0-CRF0 (FIPURDWN).
WP#
14
IN
cs
Write protected. This active low Schmitt input from the disk drive
indicates that the diskette is write-protected. This input pin is
pulled up internally by a 1 K
resistor. The resistor can be
disabled by bit 7 of L0-CRF0 (FIPURDWN).
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 10 - Revision 1.0
1.2 FDC Interface, continued
SYMBOL
PIN
I/O
FUNCTION
RDATA#
15
IN
cs
The read data input signal from the FDD. This input pin is pulled
up internally by a 1 K
resistor. The resistor can be disabled by
bit 7 of L0-CRF0 (FIPURDWN).
HEAD#
16
OD
24
Head select. This open drain output determines which disk drive
head is active.
Logic 1 = side 0
Logic 0 = side 1
DSKCHG#
17
IN
cs
Diskette change. This signal is active low at power on and
whenever the diskette is removed. This input pin is pulled up
internally by a 1 K
resistor. The resistor can be disabled by bit
7 of L0-CRF0 (FIPURDWN).
1.3 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SYMBOL
PIN
I/O
FUNCTION
SLCT
31
IN
t
PRINTER MODE:
An active high input on this pin indicates that the printer is
selected. Refer to the description of the parallel port for definition
of this pin in ECP and EPP mode.
OD
12
EXTENSION FDD MODE: WE2#
This pin is for Extension FDD B; its function is the same as the
WE# pin of FDC.
OD
12
EXTENSION 2FDD MODE: WE2#
This pin is for Extension FDD A and B; its function is the same as
the WE# pin of FDC.
PE
32
IN
t
PRINTER MODE:
An active high input on this pin indicates that the printer has
detected the end of the paper. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
OD
12
EXTENSION FDD MODE: WD2#
This pin is for Extension FDD B; its function is the same as the
WD# pin of FDC.

OD
12
EXTENSION 2FDD MODE: WD2#
This pin is for Extension FDD A and B; its function is the same as
the WD# pin of FDC.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 11 - Revision 1.0
1.3 Multi-Mode Parallel Port, continued
SYMBOL
PIN
I/O
FUNCTION
BUSY
33
IN
t

PRINTER MODE:
An active high input indicates that the printer is not ready to
receive data. Refer to the description of the parallel port for
definition of this pin in ECP and EPP mode.
OD
12
EXTENSION FDD MODE: MOB2#
This pin is for Extension FDD B; its function is the same as the
MOB# pin of FDC.
OD
12
EXTENSION 2FDD MODE: MOB2#
This pin is for Extension FDD A and B; its function is the same as
the MOB# pin of FDC.
ACK#
34
IN
t



OD
12

OD
12
PRINTER MODE: ACK#
An active low input on this pin indicates that the printer has
received data and is ready to accept more data. Refer to the
description of the parallel port for the definition of this pin in ECP
and EPP mode.
EXTENSION FDD MODE: DSB2#
This pin is for the Extension FDD B; its functions is the same as
the DSB# pin of FDC.
EXTENSION 2FDD MODE: DSB2#
This pin is for Extension FDD A and B; its function is the same as
the DSB# pin of FDC.
ERR#







45
IN
t



OD
12
OD
12
PRINTER MODE: ERR#
An active low input on this pin indicates that the printer has
encountered an error condition. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: HEAD2#
This pin is for Extension FDD B; its function is the same as the
HEAD#pin of FDC.
EXTENSION 2FDD MODE: HEAD2#
This pin is for Extension FDD A and B; its function is the same as
the HEAD# pin of FDC.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 12 - Revision 1.0
1.3 Multi-Mode Parallel Port, continued
SYMBOL
PIN
I/O
FUNCTION
SLIN#
43
OD
12

OD
12
OD
12
PRINTER MODE: SLIN#
Output line for detection of printer selection. Refer to the description
of the parallel port for the definition of this pin in ECP and EPP
mode.
EXTENSION FDD MODE: STEP2#
This pin is for Extension FDD B; its function is the same as the
STEP# pin of FDC.
EXTENSION 2FDD MODE: STEP2#
This pin is for Extension FDD A and B; its function is the same as
the STEP# pin of FDC.
INIT#
44
OD
12

OD
12

OD
12
PRINTER MODE: INIT#
Output line for the printer initialization. Refer to the description of
the parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DIR2#
This pin is for Extension FDD B; its function is the same as the
DIR# pin of FDC.
EXTENSION 2FDD MODE: DIR2#
This pin is for Extension FDD A and B; its function is the same as
the DIR# pin of FDC.
AFD#
46
OD
12



OD
12
OD
12
PRINTER MODE: AFD#
An active low output from this pin causes the printer to auto feed a
line after a line is printed. Refer to the description of the parallel port
for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DRVDEN0
This pin is for Extension FDD B; its function is the same as the
DRVDEN0 pin of FDC.
EXTENSION 2FDD MODE: DRVDEN0
This pin is for Extension FDD A and B; its function is the same as
the DRVDEN0 pin of FDC.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 13 - Revision 1.0
1.3 Multi-Mode Parallel Port, continued
SYMBOL
PIN
I/O
FUNCTION
STB#
47
OD
12
PRINTER MODE: STB#
An active low output is used to latch the parallel data into the
printer. Refer to the description of the parallel port for the definition
of this pin in ECP and EPP mode.
-
EXTENSION FDD MODE: This pin is a tri-state output.
-
EXTENSION 2FDD MODE: This pin is a tri-state output.
PD0
42
I/O
12t
PRINTER MODE: PD0
Parallel port data bus bit 0. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
IN
t
EXTENSION FDD MODE: INDEX2#
This pin is for Extension FDD B; its function is the same as the
INDEX# pin of FDC. It is pulled high internally.
IN
t
EXTENSION 2FDD MODE: INDEX2#
This pin is for Extension FDD A and B; its function is the same as
the INDEX# pin of FDC. It is pulled high internally.
PD1
41
I/O
12t

IN
t
IN
t
PRINTER MODE: PD1
Parallel port data bus bit 1. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: TRAK02#
This pin is for Extension FDD B; its function is the same as the
TRAK0# pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: TRAK02#
This pin is for Extension FDD A and B; its function is the same as
the TRAK0# pin of FDC. It is pulled high internally.
PD2
40
I/O
12t

IN
t
IN
t
PRINTER MODE: PD2
Parallel port data bus bit 2. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: WP2#
This pin is for Extension FDD B; its function is the same as the
WP# pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: WP2#
This pin is for Extension FDD A and B; its function is the same as
the WP# pin of FDC. It is pulled high internally.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 14 - Revision 1.0
1.3 Multi-Mode Parallel Port, continued
SYMBOL
PIN
I/O
FUNCTION
PD3
39
I/O
12t

IN
t
IN
t
PRINTER MODE: PD3
Parallel port data bus bit 3. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: RDATA2#
This pin is for Extension FDD B; its function is the same as the
RDATA# pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: RDATA2#
This pin is for Extension FDD A and B; its function is the same as
the RDATA# pin of FDC. It is pulled high internally.
PD4
38
I/O
12t
IN
t

IN
t
PRINTER MODE: PD4
Parallel port data bus bit 4. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DSKCHG2#
This pin is for Extension FDD B; the function of this pin is the same
as the DSKCHG# pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: DSKCHG2#
This pin is for Extension FDD A and B; this function of this pin is
the same as the DSKCHG# pin of FDC. It is pulled high internally.
PD5
37
I/O
12t

-
-
PRINTER MODE: PD5
Parallel port data bus bit 5. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION 2FDD MODE: This pin is a tri-state output.
PD6
36
I/OD
12t
-
OD
12
PRINTER MODE: PD6
Parallel port data bus bit 6. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION. 2FDD MODE: MOA2#
This pin is for Extension FDD A; its function is the same as the
MOA# pin of FDC.
PD7
35
I/OD
12t

-
OD
12
PRINTER MODE: PD7
Parallel port data bus bit 7. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION 2FDD MODE: DSA2#
This pin is for Extension FDD A; its function is the same as the
DSA# pin of FDC.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 15 - Revision 1.0
1.4 Serial Port Interface
SYMBOL
PIN
I/O
FUNCTION
CTSA#
CTSB#
49
78
IN
t
Clear To Send. It is the modem control input.
The function of these pins can be tested by reading bit 4 of the
handshake status register.
DSRA#
DSRB#
50
79
IN
t
Data Set Ready. An active low signal indicates the modem or
data set is ready to establish a communication link and transfer
data to the UART.
RTSA#
51
I/O
8t
UART A Request To Send. An active low signal informs the modem
or data set that the controller is ready to send data.
HEFRAS
During power-on reset, this pin is pulled down internally and is
defined as HEFRAS, which provides the power-on value for CR26 bit
6 (HEFRAS). A 4.7 k
is recommended if intends to pull up.
(select 4EH as configuration I/O port
s address)
RTSB#
80
I/O
8t
UART B Request To Send. An active low signal informs the modem
or data set that the controller is ready to send data.
DTRA#
PNPCSV#
52
I/O
8t
UART A Data Terminal Ready. An active low signal informs the
modem or data set that the controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is
defined as PNPCSV#, which provides the power-on value for CR24
bit 0 (PNPCSV#). A 4.7 k
is recommended if intends to pull up.
(clear the default value of FDC, UARTs, PRT, Game port and MIDI
port)
DTRB#
81
I/O
8t
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
SINA
SINB
53
82
IN
t
Serial Input. It is used to receive serial data through the
communication link.
SOUTA
54
I/O
8t
UART A Serial Output. It is used to transmit serial data out to the
communication link.
PENKBC
During power-on reset, this pin is pulled down internally and is
defined as PENKBC, which provides the power-on value for CR24 bit
2 (ENKBC). A 4.7 k
resistor is recommended if intends to pull up.
(enable KBC)
SOUTB
PEN48
83
I/O
8t
UART B Serial Output. During power-on reset, this pin is pulled
down internally and is defined as PEN48, which provides the power-
on value for CR24 bit 6 (EN48). A 4.7 k
resistor is
recommended if intends to pull up.
DCDA#
DCDB#
56
84
IN
t
Data Carrier Detect. An active low signal indicates the modem or
data set has detected a data carrier.
RIA#
RIB#
57
85
IN
t
Ring Indicator. An active low signal indicates that a ring signal is
being received from the modem or data set.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 16 - Revision 1.0
1.5 KBC Interface
SYMBOL
PIN
I/O
FUNCTION
KBLOCK#
58
IN
t
Keyboard inhibit control input. This pin is after system reset.
Internal pull high. (KBC P17)
A20GATE
59
O
12
Gate A20 output. This pin is high after system reset. (KBC P21)
KBRST
60
O
12
Keyboard reset. This pin is high after system reset. (KBC P20)
KDATA
63
I/OD
16
Keyboard Data.
MDATA
66
I/OD
16
PS2 Mouse Data.
KCLK
62
I/OD
16
Keyboard Clock.
MCLK
65
I/OD
16
PS2 Mouse Clock.
1.6 ACPI Interface
SYMBOL
PIN
I/O
FUNCTION
VBAT
74
PWR
Battery voltage input.
PSOUT#
67
OD
12
Panel Switch Output. This signal is used for Wake-Up system
from S5
cold
state. This pin is pulse output, active low.
PSIN
68
IN
td
Panel Switch Input. This pin is high active with an internal pull
down resistor.
1.7 Hardware Monitor Interface
(For W83627HF only, all these pins in W83627F are NC.)
SYMBOL
PIN
I/O
FUNCTION
CASEOPEN#
76
IN
t
CASE OPEN. An active low input from an external device when
case is opened. This signal can be latched if pin VBAT is
connect to battery, even W83627HF is power off.
-5VIN
94
AIN
0V to 4.096V FSR Analog Inputs.
-12VIN
95
AIN
0V to 4.096V FSR Analog Inputs.
+12VIN
96
AIN
0V to 4.096V FSR Analog Inputs.
+3.3VIN
98
AIN
0V to 4.096V FSR Analog Inputs.
VCOREB
99
AIN
0V to 4.096V FSR Analog Inputs.
VCOREA
100
AIN
0V to 4.096V FSR Analog Inputs.
VREF
101
AOUT
Reference Voltage for temperature measuration.
VTIN3
102
AIN
Temperature sensor 3 input. It is used for CPU2 temperature
measuration.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 17 - Revision 1.0
1.7 Hardware Monitor Interface, continued
SYMBOL
PIN
I/O
FUNCTION
VTIN2
103
AIN
Temperature sensor 2 input. It is used for CPU1 temperature
measuration.
VTIN1
104
AIN
Temperature sensor 1 input. It is used for system temperature
measuration.
OVT#
105
OD
12
Over temperature Shutdown Output. It indicated the VTIN2 or
VTIN3 is over temperature limit.
VID[4:0]
106-
110
IN
t
Voltage Supply readouts from Pentium II .
FANIO[3:1]
111-
113
I/O
12ts
0V to +5V amplitude fan tachometer input.
Alternate Function: Fan on-off control output.
These multifunctional pins can be programmable input or output.
FANPWM1
FANPWM2
116
115
O
12
Fan speed control. Use the Pulse Width Modulatuion (
PWM
)
technic knowledge to control the Fan's RPM.
BEEP
118
OD
12
Beep function for hardware monitor. This pin is low after system
reset.
1.8 Game Port & MIDI Port
SYMBOL
PIN
I/O
FUNCTION
GPSA1
GP10
128
INcs
I/OD
12
Active-low, Joystick I switch input 1. (Default)
General purpose I/O port 1 bit 0.
P12
I/OD
12
Alternate Function Output:KBC P12 I/O port.
GPSB1
GP11
127
INcs
I/OD
12
Active-low, Joystick II switch input 1. (Default)
General purpose I/O port 1 bit 1.
P13
I/OD
12
Alternate Function Output:KBC P13 I/O port.
GPX1

GP12
126
I/OD
12
I/OD
12
Joystick I timer pin. this pin connect to X positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 2.
P14
I/OD
12
Alternate Function Output:KBC P14 I/O port.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 18 - Revision 1.0
1.8
Game Port & MIDI Port, continued
SYMBOL
PIN
I/O
FUNCTION
GPX2

GP13
125
I/OD
12
I/OD
12
Joystick II timer pin. this pin connect to X positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 3.
P15
I/OD
12
Alternate Function Output:KBC P15 I/O port.
GPY2

GP14
124
I/OD
12
I/OD
12
Joystick II timer pin. this pin connect to Y positioning variable
resistors for the Josystick. (Default)
General purpose I/O port 1 bit 4.
P16
I/OD
12
Alternate Function Output:KBC P16 I/O port.
GPY1
123
I/OD
12
Joystick I timer pin. this pin connect to Y positioning variable
resistors for the Josystick. (Default)
GP15
I/OD
12
General purpose I/O port 1 bit 5.
GPSB2
122
INcs
Active-low, Joystick II switch input 2. This pin has an internal pull-
up resistor. (Default)
GP16
I/OD
12
General purpose I/O port 1 bit 6.
GPSA2
121
INcs
Active-low, Joystick I switch input 2. This pin has an internal pull-
up resistor. (Default)
GP17
I/OD
12
General purpose I/O port 1 bit 7.
MSI
GP20
119
INt
I/OD
12t
MIDI serial data input .(Default)
General purpose I/O port 2 bit 0.
MSO
IRQIN0
120
OUT
12t
IN
t
MIDI serial data output. (Default)
Alternate Function input: Interrupt channel input.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 19 - Revision 1.0
1.9 General Purpose I/O Port
1.9.1 General Purpose I/O Port 1 (Power source is Vcc)
see 1.8 Game Port
1.9.2 General Purpose I/O Port 2 (Power source is Vcc)
SYMBOL
PIN
I/O
FUNCTION
GP20
MSI
119
I/OD
12t
INt
General purpose I/O port 2 bit 0.
MIDI serial data input. Schmitt trigger input with internal pull-up
register. (Default)
GP21
(SCL)
92
I/OD
12t
IN
ts
General purpose I/O port 2 bit 1.
(Alternate Function: Serial Bus Clock. For W83627HF Only)
GP22
(SDA)
91
I/OD
12t
I/OD
12ts
General purpose I/O port 2 bit 2.
(Alternate Function: Serial Bus bi-directional Data.
For W83627HF Only)
GP23
PLED
90
I/OD
24t
OD
24t
General purpose I/O port 2 bit 3.
Power LED output, this signal is low after system reset. (Default)
GP24
89
I/OD
12t
General purpose I/O port 2 bit 4.
WDTO
OD
12t
Watch dog timer output. (Default)
GP25
IRRX
88
I/OD
12t
IN
ts
General purpose I/O port 2 bit 5.
Alternate Function Input: Infrared Receiver input. (Default)
GP26
IRTX
87
I/OD
12t
OUT
12t
General purpose I/O port 2 bit 6.
Alternate Function Output: Infrared Transmitter Output. (Default)
GP27
DRVDEN1
IRQIN1
2
I/OD
24t
OD
24t
IN
t
General purpose I/O port 2 bit 7.
Drive Density Select bit 0. (Default)
Alternate Function Input: Interrupt channel input.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 20 - Revision 1.0
1.9.3 General Purpose I/O Port 3 (Power souce is VSB)
SYMBOL
PIN
I/O
FUNCTION
GP30
73
I/OD
12t
General purpose I/O port 3 bit 0.
SLP_SX#
IN
t
Chpset suspend C status input.
GP31
72
I/OD
12t
General purpose I/O port 3 bit 1.
PWRCTL#
OD
12t
This pin generates the PWRCTL# signal while the power failure.
(Default)
GP32
71
I/OD
12t
General purpose I/O port 3 bit 2.
PWROK
OD
12t
This pin generates the PWROK signal while the VCC come in.
(Default)
GP33
70
I/OD
12t
General purpose I/O port 3 bit 3.
RSMRST#
OD
12t
This pin generates the RSMRST signal while the VSB come in.
(Default)
GP34
69
I/OD
12t
General purpose I/O port 3 bit 4.
CIRRX#
OD
12t
Consumer IR receiving input. This pin can Wake-Up system from
S5
cold.
(Default)
GP35
64
I/OD
24t
General purpose I/O port 3 bit 5.
SUSLED
OD
24t
Suspend LED output, it can program to flash when suspend state.
This function can work without VCC. (Default)
1.10 POWER PINS
SYMBOL
PIN
FUNCTION
VCC
12, 48, 77, 114
+5V power supply for the digital circuitry.
VSB
61
+5V stand-by power supply for the digital circuitry.
VCC3V
28
+3.3V power supply for driving 3V on host interface.
AVCC
97
Analog VCC input. Internally supplier to all analog circuitry.
AGND
93
Internally connected to all analog circuitry. The ground reference
for all analog inputs..
VSS
20, 55, 86, 117
Ground.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 21 - Revision 1.0
2. LPC (LOW PIN COUNT) INTERFACE
LPC interface is to replace ISA interface serving as a bus interface between host (chip-set) and
peripheral (Winbond I/O). Data transfer on the LPC bus are serialized over a 4 bit bus. The general
characteristics of the interface implemented in Winbond LPC I/O are:
One control line, namely LFRAME#, which is used by the host to start or stop transfers. No
peripherals drive this signal.
The LAD[3:0] bus, which communicates information serially. The information conveyed are cycle
type, cycle direction, chip selection, address, data, and wait states.
MR (master reset) of Winbond ISA I/O is replaced with a active low reset signal, namely LRESET#, in
Winbond LPC I/O.
An additional 33 MHz PCI clock is needed in Winbond LPC I/O for synchronization.
DMA requests are issued through LDRQ#.
Interrupt requests are issued through SERIRQ.
Power management events are issued through PME#.

Comparing to its ISA counterpart, LPC implementation saves up to 40 pin counts (see table below) free
for integrating more devices on a single chip.
Winbond I/O
Interface pins
count
W83977TF
D[7:0], SA[15:0], DRQ[3:0], DACK#[3:0], TC, IOR#, IOW#, IOCHRDY, IRQs
49
W83627HF
LAD[3:0], LFRAME#, PCICLK, LDRQ#, SERIRQ, PME#
9
save
40

The transition from ISA to LPC is transparent in terms of software which means no BIOS or device driver
update is needed except chip-specific configuration.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 22 - Revision 1.0
3. FDC FUNCTIONAL DESCRIPTION
3.1 W83627HF FDC
The floppy disk controller of the W83627HF integrates all of the logic required for floppy disk control.
The FDC implements a PC/AT or PS/2 solution. All programmable options default to compatible
values. The FIFO provides better system performance in multi-master systems. The digital data
separator supports up to 2 M bits/sec data rate.
The FDC includes the following blocks: AT interface, Precompensation, Data Rate Selection, Digital
Data Separator, FIFO, and FDC Core.
3.1.1 AT interface
The interface consists of the standard asynchronous signals: RD#, WR#, A0-A3, IRQ, DMA control, and
a data bus. The address lines select between the configuration registers, the FIFO and control/status
registers. This interface can be switched between PC/AT, Model 30, or PS/2 normal modes. The PS/2
register sets are a superset of the registers found in a PC/AT.
3.1.2 FIFO (Data)
The FIFO is 16 bytes in size and has programmable threshold values. All command parameter
information and disk data transfers go through the FIFO. Data transfers are governed by the RQM and
DIO bits in the Main Status Register.
The FIFO defaults to disabled mode after any form of reset. This maintains PC/AT hardware
compatibility. The default values can be changed through the CONFIGURE command. The advantage of
the FIFO is that it allows the system a larger DMA latency without causing disk errors. The following
tables give several examples of the delays with a FIFO. The data are based upon the following formula:
THRESHOLD #
(1/DATA/RATE) *8 - 1.5
S = DELAY
FIFO THRESHOLD
MAXIMUM DELAY TO SERVICING AT 500K BPS
Data Rate
1 Byte
1
16
S - 1.5
S = 14.5
S
2 Byte
2
16
S - 1.5
S = 30.5
S
8 Byte
8
16
S - 1.5
S = 6.5
S
15 Byte
15
16
S - 1.5
S = 238.5
S
FIFO THRESHOLD
MAXIMUM DELAY TO SERVICING AT 1M BPS
Data Rate
1 Byte
1
8
S - 1.5
S = 6.5
S
2 Byte
2
8
S - 1.5
S = 14.5
S
8 Byte
8
8
S - 1.5
S = 62.5
S
15 Byte
15
8
S - 1.5
S = 118.5
S
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 23 - Revision 1.0
At the start of a command the FIFO is always disabled and command parameters must be sent based
upon the RQM and DIO bit settings in the main status register. When the FDC enters the command
execution phase, it clears the FIFO of any data to ensure that invalid data are not transferred.
An overrun and underrun will terminate the current command and the data transfer. Disk writes will
complete the current sector by generating a 00 pattern and valid CRC. Reads require the host to remove
the remaining data so that the result phase may be entered.
DMA transfers are enabled with the SPECIFY command and are initiated by the FDC by activating the
DRQ pin during a data transfer command. The FIFO is enabled directly by asserting DACK# and
addresses need not be valid.
Note that if the DMA controller is programmed to function in verify mode a pseudo read is performed by
the FDC based only on DACK#. This mode is only available when the FDC has been configured into byte
mode (FIFO disabled) and is programmed to do a read. With the FIFO enabled the above operation is
performed by using the new VERIFY command. No DMA operation is needed.@
3.1.3 Data Separator
The function of the data separator is to lock onto the incoming serial read data. When a lock is achieved
the serial front end logic of the chip is provided with a clock which is synchronized to the read data. The
synchronized clock, called the Data Window, is used to internally sample the serial data portion of the
bit cell, and the alternate state samples the clock portion. Serial to parallel conversion logic separates
the read data into clock and data bytes.
The Digital Data Separator (DDS) has three parts: control logic, error adjustment, and speed tracking.
The DDS circuit cycles once every 12 clock cycles ideally. Any data pulse input will be synchronized
and then adjusted by immediate error adjustment. The control logic will generate RDD and RWD for
every pulse input. During any cycle where no data pulse is present, the DDS cycles are based on speed.
A digital integrator is used to keep track of the speed changes in the input data stream.
3.1.4 Write Precompensation
The write precompensation logic is used to minimize bit shifts in the RDDATA stream from the disk
drive. Shifting of bits is a known phenomenon in magnetic media and is dependent on the disk media
and the floppy drive.
The FDC monitors the bit stream that is being sent to the drive. The data patterns that require
precompensation are well known. Depending upon the pattern, the bit is shifted either early or late
relative to the surrounding bits.
3.1.5 Perpendicular Recording Mode
The FDC is also capable of interfacing directly to perpendicular recording floppy drives. Perpendicular
recording differs from the traditional longitudinal method in that the magnetic bits are oriented vertically.
This scheme packs more data bits into the same area.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 24 - Revision 1.0
FDCs with perpendicular recording drives can read standard 3.5" floppy disks and can read and write
perpendicular media. Some manufacturers offer drives that can read and write standard and
perpendicular media in a perpendicular media drive.
A single command puts the FDC into perpendicular mode. All other commands operate as they normally
do. The perpendicular mode requires a 1 Mbps data rate for the FDC. At this data rate the FIFO eases
the host interface bottleneck due to the speed of data transfer to or from the disk.
3.1.6 FDC Core
The W83627HF FDC is capable of performing twenty commands. Each command is initiated by a multi-
byte transfer from the microprocessor. The result can also be a multi-byte transfer back to the
microprocessor. Each command consists of three phases: command, execution, and result.
Command
The microprocessor issues all required information to the controller to perform a specific operation.
Execution
The controller performs the specified operation.
Result
After the operation is completed, status information and other housekeeping information is provided to
the microprocessor.
3.1.7 FDC Commands
Command Symbol Descriptions:
C:
Cylinder number 0 - 256
D:
Data Pattern
DIR:
Step Direction
DIR = 0, step out
DIR = 1, step in
DS0:
Disk Drive Select 0
DS1:
Disk Drive Select 1
DTL:
Data Length
EC:
Enable Count
EOT:
End of Track
EFIFO:
Enable FIFO
EIS:
Enable Implied Seek
EOT:
End of track
FIFOTHR: FIFO Threshold
GAP:
Gap length selection
GPL:
Gap Length
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 25 - Revision 1.0
H:
Head number
HDS:
Head number select
HLT:
Head Load Time
HUT:
Head Unload Time
LOCK:
Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset
MFM:
MFM or FM Mode
MT:
Multitrack
N:
The number of data bytes written in a sector
NCN:
New Cylinder Number
ND:
Non-DMA Mode
OW:
Overwritten
PCN:
Present Cylinder Number
POLL:
Polling Disable
PRETRK: Precompensation Start Track Number
R:
Record
RCN:
Relative Cylinder Number
R/W:
Read/Write
SC:
Sector/per cylinder
SK:
Skip deleted data address mark
SRT:
Step Rate Time
ST0:
Status Register 0
ST1:
Status Register 1
ST2:
Status Register 2
ST3:
Status Register 3
WG:
Write gate alters timing of WE
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 26 - Revision 1.0
(1) Read Data
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
MT MFM SK
0
1
1
0
0
Command codes
W
0
0
0
0
0
HDS DS1 DS0
W
W
-------------------------------- C ---------------------------------
--------------------------------- H ----------------------------------
Sector ID information prior
to command execution
W
W
-------------------------------- R ---------------------------------
-------------------------------- N --------------------------------
W
W
------------------------------- EOT -------------------------------
------------------------------ GPL ------------------------------
W
-------------------------------- DTL -------------------------------
Execution
Data transfer between the
FDD and system
Result
R
R
R
----------------------------- ST0 ----------------------------------
----------------------------- ST1 ----------------------------------
----------------------------- ST2 ----------------------------------
Status information after
command execution
R
R
R
R
-------------------------------- C -----------------------------------
-------------------------------- H -----------------------------------
-------------------------------- R -----------------------------------
--------------------------------- N -----------------------------------
Sector ID information after
command execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 27 - Revision 1.0
(2) Read Deleted Data
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
MT MFM
SK
0
1
1
0
0
Command codes
W
0
0
0
0
0
HDS DS1 DS0
W
W
-------------------------------- C -------------------------------------
-------------------------------- H -------------------------------------
Sector ID information prior to
command execution
W
W
------------------------------- R ------------------------------------
-------------------------------- N -------------------------------------
W
W
------------------------------ EOT ----------------------------------
------------------------------ GPL ----------------------------------
W ------------------------------ DTL ----------------------------------
Execution
Data transfer between the
FDD and system
Result
R
R
R
------------------------- ST0 -----------------------------
-------------------------- ST1 -----------------------------
------------------------- ST2 ----------------------------
Status information after
command execution
R
R
R
R
---------------------------- C -------------------------------
---------------------------- H -------------------------------
---------------------------- R -------------------------------
--------------------------- N ------------------------------
Sector ID information after
command execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 28 - Revision 1.0
(3) Read A Track
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
MFM
0
0
0
0
1
0
Command codes
W
0
0
0
0
0
HDS DS1 DS0
W
W
------------------------------- C ---------------------------------
------------------------------ H --------------------------------
Sector ID information prior
to command execution
W
W
------------------------------- R ---------------------------------
-------------------------------- N ---------------------------------
W
W
----------------------------- EOT ------------------------------
----------------------------- GPL ------------------------------
W
----------------------------- DTL ------------------------------
Execution

Data transfer between the
FDD and system; FDD
reads contents of all
cylinders from index hole
to EOT
Result
R
R
R
------------------------------ ST0 ----------------------------------
------------------------------ ST1 ----------------------------------
------------------------------ ST2 ----------------------------------
Status information after
command execution
R
R
R
R
--------------------------------- C ------------------------------------
-------------------------------- H ------------------------------------
------------------------------- R -----------------------------------
-------------------------------- N ------------------------------------
Sector ID information after
command execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 29 - Revision 1.0
(4) Read ID
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
MFM
0
0
1
0
1
0
Command codes
W
0
0
0
0
0
HDS DS1 DS0
Execution
The first correct ID
information on the cylinder
is stored in Data Register
Result
R
R
R
------------------------------ ST0 ---------------------------------
------------------------------ ST1 --------------------------------
------------------------------ ST2 ---------------------------------
Status information after
command execution
R
R
R
R
-------------------------------- C ---------------------------------
--------------------------------- H ----------------------------------
--------------------------------- R ----------------------------------
-------------------------------- N ---------------------------------
Disk status after the
command has been
completed
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 30 - Revision 1.0
(5) Verify
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
MT MFM SK
1
0
1
1
0
Command codes
W
EC
0
0
0
0
HDS DS1 DS0
W
W
----------------------------- C ---------------------------------
------------------------------ H ---------------------------------
Sector ID information prior
to command execution
W
W
----------------------------- R ---------------------------------
------------------------------ N ---------------------------------
W
W
---------------------------- EOT -------------------------------
---------------------------- GPL -------------------------------
--------------------------- DTL/SC ---------------------------
Execution
No data transfer takes
place
Result
R
R
R
---------------------------- ST0 ----------------------------------
---------------------------- ST1 ---------------------------------
---------------------------- ST2 ---------------------------------
Status information after
command execution
R
R
R
R
------------------------------ C ----------------------------------
------------------------------ H ----------------------------------
------------------------------ R -----------------------------------
------------------------------ N -----------------------------------
Sector ID information after
command execution

(6) Version
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
1
0
0
0
0
Command code
Result
R
1
0
0
1
0
0
0
0
Enhanced controller
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 31 - Revision 1.0
(7) Write Data
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
MT MFM
0
0
0
1
0
1
Command codes
W
0
0
0
0
0
HDS DS1 DS0
W
W
------------------------------ C ---------------------------------
------------------------------ H --------------------------------
Sector ID information prior
to Command execution
W
W
------------------------------ R --------------------------------
------------------------------- N --------------------------------
W
W
----------------------------- EOT -----------------------------
---------------------------- GPL -----------------------------
W
----------------------------- DTL ------------------------------
Execution
Data transfer between the
FDD and system
Result
R
R
R
----------------------------- ST0 -------------------------------
----------------------------- ST1 -------------------------------
----------------------------- ST2 -------------------------------
Status information after
Command execution
R
R
R
R
------------------------------ C ----------------------------------
------------------------------ H ----------------------------------
------------------------------ R ----------------------------------
------------------------------ N ----------------------------------
Sector ID information after
Command execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 32 - Revision 1.0
(8) Write Deleted Data
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
MT
MFM
0
0
1
0
0
1
Command codes
W
0
0
0
0
0
HDS
DS1
DS0
W
W
-------------------------------- C ----------------------------------
-------------------------------- H ----------------------------------
W
W
--------------------------------- R ----------------------------------
--------------------------------- N ----------------------------------
Sector ID
information prior to
command
execution
W
W
W
------------------------------- EOT ------------------------------
------------------------------- GPL ------------------------------
-------------------------------- DTL -------------------------------
Execution
Data transfer
between the FDD
and system
Result
R
R
R
-------------------------------- ST0 --------------------------------
--------------------------------- ST1 --------------------------------
--------------------------------- ST2 --------------------------------
Status information
after command
execution
R
R
R
R
----------------------------------- C ----------------------------------
----------------------------------- H ----------------------------------
----------------------------------- R ----------------------------------
----------------------------------- N ----------------------------------
Sector ID
information after
command
execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 33 - Revision 1.0
(9) Format A Track
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
MFM
0
0
1
1
0
1
Command codes
W
0
0
0
0
0
HDS
DS1
DS0
W
W
---------------------------------- N --------------------------------------
---------------------------------- SC -------------------------------------
Bytes/Sector
Sectors/Cylinder
W
W
---------------------------------- GPL ------------------------------------
------------------------------------ D --------------------------------------
Gap 3
Filler Byte
Execution
for Each
Sector
Repeat:
W
W
W
W
------------------------------------ C --------------------------------------
------------------------------------- H ----------------------------------------
------------------------------------- R ----------------------------------------
------------------------------------- N ----------------------------------------
Input Sector
Parameters
Result
R
R
R
--------------------------------- ST0 -----------------------------------
----------------------------------- ST1 -------------------------------------
---------------------------------- ST2 ------------------------------------
Status information
after command
execution
R
R
R
R
-------------------------------- Undefined --------------------------------
-------------------------------- Undefined --------------------------------
--------------------------------- Undefined ---------------------------------
-------------------------------- Undefined --------------------------------

(10) Recalibrate
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
0
1
1
1
Command codes
W
0
0
0
0
0
0
DS1
DS0
Execution
Head retracted to
Track 0 Interrupt
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 34 - Revision 1.0
(11) Sense Interrupt Status
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
1
0
0
0
Command code
Result
R
R
------------------------------------ ST0 ---------------------------------------
--------------------------------- PCN ------------------------------------
Status information
at the end of each
seek operation
(12) Specify
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
0
0
1
1
Command codes
W
W
| ------------------SRT --------------------- | -------------- HUT ---------- |
|------------------------------------ HLT ------------------------------| ND
(13) Seek
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
1
1
1
1
Command codes
W
0
0
0
0
0
HDS
DS1
DS0
W
------------------------------------ NCN -------------------------------------
Execution
R
Head positioned
over proper cylinder
on diskette
(14) Configure
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
1
0
0
1
1
Configure information
W
0
0
0
0
0
0
0
0
W
0 EIS EFIFO POLL | -------------- FIFOTHR ---------------|
W
| -----------------------------------PRETRK -------------------------------- |
Execution
Internal registers
written
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 35 - Revision 1.0
(15) Relative Seek
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
1
DIR
0
0
1
1
1
1
Command codes
W
0
0
0
0
0
HDS
DS1
DS0
W
| ------------------------------------- RCN ----------------------------- |

(16) Dumpreg
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
1
1
1
0
Registers placed in
FIFO
Result
R
R
R
R
R
R
R
-------------------------------- PCN-Drive 0-------------------------------
-------------------------------- PCN-Drive 1 ------------------------------
------------------------------- PCN-Drive 2------------------------------
--------------------------------- PCN-Drive 3 -------------------------------
--------------SRT ----------------- | ---------------- HUT ---------------
-------------------- HLT --------------------------------------------| ND
-------------------------------- SC/EOT ----------------------------------
R
LOCK
0
D3
D2
D1
D0
GAP
WG
R
R
0 EIS EFIFO POLL | ----------------- FIFOTHR ------------------
---------------------------------PRETRK -------------------------------------
(17) Perpendicular Mode
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
1
0
0
1
0
Command Code
W
OW
0
D3
D2
D1
D0
GAP
WG
(18) Lock
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
LOCK
0
0
1
0
1
0
0
Command Code
Result
R
0
0
0
LOCK
0
0
0
0
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 36 - Revision 1.0
(19) Sense Drive Status
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
0
0
1
0
0
Command Code
W
0
0
0
0
0
HDS
DS1
DS0
Result
R
--------------------------- ST3 -------------------------------------
Status information
about disk drive
(20) Invalid
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
------------------------------- Invalid Codes -----------------------------
Invalid codes (no
operation- FDC
goes to standby
state)
Result
R
----------------------------------- ST0 -----------------------------------
ST0 = 80H
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 37 - Revision 1.0
3.2
Register Descriptions
There are several status, data, and control registers in W83627HF. These registers are defined below:
ADDRESS
REGISTER
OFFSET
READ
WRITE
base address + 0
base address + 1
base address + 2
base address + 3
SA REGISTER
SB REGISTER
TD REGISTER

DO REGISTER
TD REGISTER
base address + 4
MS REGISTER
DR REGISTER
base address + 5
DT (FIFO) REGISTER
DT (FIFO) REGISTER
base address + 7
DI REGISTER
CC REGISTER
3.2.1 Status Register A (SA Register) (Read base address + 0)
This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2 mode,
the bit definitions for this register are as follows:
1
2
3
4
5
6
7
0
WP
INDEX
HEAD
TRAK0
STEP
DRV2
INIT PENDING
DIR

INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRV2# (Bit 6):
0
A second drive has been installed
1
A second drive has not been installed

STEP (Bit 5):
This bit indicates the complement of STEP# output.
TRAK0# (Bit 4):
This bit indicates the value of TRAK0# input.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 38 - Revision 1.0
HEAD (Bit 3):
This bit indicates the complement of HEAD# output.
0
side 0
1
side 1
INDEX# (Bit 2):
This bit indicates the value of INDEX# output.
WP# (Bit 1):
0
disk is write-protected
1
disk is not write-protected
DIR (Bit 0)
This bit indicates the direction of head movement.
0
outward direction
1
inward direction
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
1
2
3
4
5
6
7
0
WP
INDEX
HEAD
TRAK0
STEP F/F
DRQ
INIT PENDING
DIR
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRQ (Bit 6):
This bit indicates the value of DRQ output pin.
STEP F/F (Bit 5):
This bit indicates the complement of latched STEP# output.
TRAK0 (Bit 4):
This bit indicates the complement of TRAK0# input.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 39 - Revision 1.0
HEAD# (Bit 3):
This bit indicates the value of HEAD# output.
0
side 1
1
side 0
INDEX (Bit 2):
This bit indicates the complement of INDEX# output.
WP (Bit 1):
0
disk is not write-protected
1
disk is write-protected
DIR# (Bit 0)
This bit indicates the direction of head movement.
0
inward direction
1
outward direction
3.2.2 Status Register B (SB Register) (Read base address + 1)
This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2 mode,
the bit definitions for this register are as follows:
1
2
3
4
5
6
7
0
MOT EN A
WE
RDATA Toggle
WDATA Toggle
Drive SEL0
MOT EN B
1
1
Drive SEL0 (Bit 5):
This bit indicates the status of DO REGISTER bit 0 (drive select bit 0).
WDATA Toggle (Bit 4):
This bit changes state at every rising edge of the WD# output pin.
RDATA Toggle (Bit 3):
This bit changes state at every rising edge of the RDATA# output pin.
WE (Bit 2):
This bit indicates the complement of the WE# output pin.
MOT EN B (Bit 1)
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 40 - Revision 1.0
This bit indicates the complement of the MOB# output pin.
MOT EN A (Bit 0)
This bit indicates the complement of the MOA# output pin.
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
1
2
3
4
5
6
7
0
DSC
DSD
WE F/F
RDATA F/F
DSA
DSB
DRV2
WD F/F
DRV2# (Bit 7):
0 A second drive has been installed
1 A second drive has not been installed
DSB# (Bit 6):
This bit indicates the status of DSB# output pin.
DSA# (Bit 5):
This bit indicates the status of DSA# output pin.
WD F/F(Bit 4):
This bit indicates the complement of the latched WD# output pin at every rising edge of the WD#
output pin.
RDATA F/F(Bit 3):
This bit indicates the complement of the latched RDATA# output pin .
WE F/F (Bit 2):
This bit indicates the complement of latched WE# output pin.
DSD# (Bit 1):
0 Drive D has been selected
1 Drive D has not been selected
DSC# (Bit 0):
0 Drive C has been selected
1 Drive C has not been selected
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 41 - Revision 1.0
3.2.3 Digital Output Register (DO Register) (Write base address + 2)
The Digital Output Register is a write-only register controlling drive motors, drive selection, DRQ/IRQ
enable, and FDC resetting. All the bits in this register are cleared by the MR pin. The bit definitions are
as follows:
7
6
5
4
3
2
1-0
Drive Select: 00 select drive A
01 select drive B
10 select drive C
11 select drive D
Floppy Disk Controller Reset
Active low resets FDC
DMA and INT Enable
Active high enable DRQ/IRQ
Motor Enable A. Motor A on when active high
Motor Enable B. Motor B on when active high
Motor Enable C. Motor C on when active high
Motor Enable D. Motor D on when active high
3.2.4 Tape Drive Register (TD Register) (Read base address + 3)
This register is used to assign a particular drive number to the tape drive support mode of the data
separator. This register also holds the media ID, drive type, and floppy boot drive information of the floppy
disk drive. In normal floppy mode, this register includes only bit 0 and 1. The bit definitions are as
follows:
1
2
3
4
5
6
7
0
Tape sel 0
Tape sel 1
X
X
X
X
X
X

If three mode FDD function is enabled (EN3MODE = 1 in CR9), the bit definitions are as follows:
1
2
3
4
5
6
7
0
Floppy boot drive 0
Floppy boot drive 1
Drive type ID0
Drive type ID1
Media ID0
Media ID1
Tape Sel 0
Tape Sel 1
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 42 - Revision 1.0
Media ID1 Media ID0 (Bit 7, 6):
These two bits are read only. These two bits reflect the value of CR8 bit 3, 2.
Drive type ID1 Drive type ID0 (Bit 5, 4):
These two bits reflect two of the bits of CR7. Which two bits are reflected depends on the last drive
selected in the DO REGISTER.
Floppy Boot drive 1, 0 (Bit 3, 2):
These two bits reflect the value of CR8 bit 1, 0.
Tape Sel 1, Tape Sel 0 (Bit 1, 0):
These two bits assign a logical drive number to the tape drive. Drive 0 is not available as a tape drive and
is reserved as the floppy disk boot drive.
TAPE SEL 1
TAPE SEL 0
DRIVE SELECTED
0
0
None
0
1
1
1
0
2
1
1
3
3.2.5 Main Status Register (MS Register) (Read base address + 4)
The Main Status Register is used to control the flow of data between the microprocessor and the
controller. The bit definitions for this register are as follows:
FDD 0 Busy, (D0B = 1), FDD number 0 is in the SEEK mode.
FDD 1 Busy, (D1B = 1), FDD number 1 is in the SEEK mode.
FDC Busy, (CB). A read or write command is in the process when CB = HIGH.
Non-DMA mode, the FDC is in the non-DMA mode, this bit is set only during the
execution phase in non-DMA mode.
Transition to LOW state indicates execution phase has ended.
DATA INPUT/OUTPUT, (DIO). If DIO= HIGH then transfer is from Data Register to the processor.
If DIO = LOW then transfer is from processor to Data Register.
Request for Master (RQM). A high on this bit indicates Data Register is ready to send or receive data to or from the processor.
7
6
5
4
3
2
1
0
FDD 2 Busy, (D2B = 1), FDD number 2 is in the SEEK mode.
FDD 3 Busy, (D3B = 1), FDD number 3 is in the SEEK mode.
3.2.6 Data Rate Register (DR Register) (Write base address + 4)
The Data Rate Register is used to set the transfer rate and write precompensation. The data rate of the
FDC is programmed by the CC REGISTER for PC-AT and PS/2 Model 30 and PS/2 mode, and not by
the DR REGISTER. The real data rate is determined by the most recent write to either of the DR
REGISTER or CC REGISTER.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 43 - Revision 1.0
1
2
3
4
5
6
7
0
DRATE0
DRATE1
PRECOMP0
PRECOMP1
PRECOMP2
POWER DOWN
S/W RESET
0
S/W RESET (Bit 7):
This bit is the software reset bit.
POWER-DOWN (Bit 6):
0 FDC in normal mode
1 FDC in power-down mode
PRECOMP2 PRECOMP1 PRECOMP0 (Bit 4, 3, 2):
These three bits select the value of write precompensation. The following tables show the
precompensation values for the combination of these bits.
PRECOMP
PRECOMPENSATION DELAY
2 1 0
250K - 1 Mbps
2 Mbps Tape drive
0 0 0
Default Delays
Default Delays
0 0 1
41.67 nS
20.8 nS
0 1 0
83.34 nS
41.17 nS
0 1 1
125.00 nS
62.5nS
1 0 0
166.67 nS
83.3 nS
1 0 1
208.33 nS
104.2 nS
1 1 0
250.00 nS
125.00 nS
1 1 1
0.00 nS (disabled)
0.00 nS (disabled)
DATA RATE
DEFAULT PRECOMPENSATION DELAYS
250 KB/S
125 nS
300 KB/S
125 nS
500 KB/S
125 nS
1 MB/S
41.67nS
2 MB/S
20.8 nS
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 44 - Revision 1.0
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC and reduced write current control.
00 500 KB/S (MFM), 250 KB/S (FM), RWC = 1
01 300 KB/S (MFM), 150 KB/S (FM), RWC = 0
10 250 KB/S (MFM), 125 KB/S (FM), RWC = 0
11 1 MB/S (MFM), Illegal (FM), RWC = 1
The 2 MB/S data rate for Tape drive is only supported by setting 01 to DRATE1 and DRATE0 bits, as
well as setting 10 to DRT1 and DRT0 bits which are two of the Configure Register CRF4 or CRF5 bits in
logic device 0. Please refer to the function description of CRF4 or CRF5 and data rate table for individual
data rates setting.
3.2.7 FIFO Register (R/W base address + 5)
The Data Register consists of four status registers in a stack with only one register presented to the
data bus at a time. This register stores data, commands, and parameters and provides diskette-drive
status information. Data bytes are passed through the data register to program or obtain results after a
command. In the W83627HF, this register defaults to FIFO disabled mode after reset. The FIFO can
change its value and enable its operation through the CONFIGURE command.
Status Register 0 (ST0)
7-6
5
4
3
2
1-0
US1, US0 Drive Select:
00 Drive A selected
01 Drive B selected
10 Drive C selected
11 Drive D selected
HD Head address:
1 Head selected
0 Head selected
NR Not Ready:
1 Drive is not ready
0 Drive is ready
EC Equipment Check:
1 When a fault signal is received from the FDD or the track
0 signal fails to occur after 77 step pulses
0 No error
SE Seek end:
1 seek end
0 seek error
IC Interrupt Code:
00 Normal termination of command
01 Abnormal termination of command
10 Invalid command issue
11 Abnormal termination because the ready signal from FDD changed state during command execution
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 45 - Revision 1.0
Status Register 1 (ST1)
Missing Address Mark. 1 When the FDC cannot detect the data address mark
or the data address mark has been deleted.
NW (Not Writable). 1 If a write Protect signal is detected from the diskette drive during
execution of write data.
ND (No DATA). 1 If specified sector cannot be found during execution of a read, write or verifly data.
Not used. This bit is always 0.
OR (Over Rum). 1 If the FDC is not serviced by the host system within a certain time interval during data transfer.
DE (data Error).1 When the FDC detects a CRC error in either the ID field or the data field.
Not used. This bit is always 0.
EN (End of track). 1 When the FDC tries to access a sector beyond the final sector of a cylinder.
0
1
2
3
4
5
6
7

Status Register 2 (ST2)
1
2
3
4
5
6
7
0
BC (Bad Cylinder)
MD (Missing Address Mark in Data Field).
1 If the FDC cannot find a data address mark
(or the address mark has been deleted)
when reading data from the media
0 No error
1 Bad Cylinder
0 No error
SN (Scan Not satisfied)
1 During execution of the Scan command
0 No error
SH (Scan Equal Hit)
1 During execution of the Scan command, if the equal condition is satisfied
0 No error
WC (Wrong Cylinder)
1 Indicates wrong Cylinder
DD (Data error in the Data field)
1 If the FDC detects a CRC error in the data field
0 No error
CM (Control Mark)
1 During execution of the read data or scan command
0 No error
Not used. This bit is always 0
Status Register 3 (ST3)
1
2
3
4
5
6
7
0
US0 Unit Select 0
US1 Unit Select 1
HD Head Address
TS Two-Side
TO Track 0
RY Ready
WP Write Protected
FT Fault
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 46 - Revision 1.0
3.2.8 Digital Input Register (DI Register) (Read base address + 7)
The Digital Input Register is an 8-bit read-only register used for diagnostic purposes. In a PC/XT or AT
only Bit 7 is checked by the BIOS. When the register is read, Bit 7 shows the complement of
DSKCHG#
,
while other bits of the data bus remain in tri-state. Bit definitions are as follows:
x
x
x
x
x
x
x
x
0
1
2
3
4
5
6
7
Reserved for the hard disk controller
During a read of this register, these bits are in tri-state
DSKCHG
In the PS/2 mode, the bit definitions are as follows:
1
2
3
4
5
6
7
0
HIGH DENS
DRATE0
DRATE1
DSKCHG
1
1
1
1
DSKCHG (Bit 7):
This bit indicates the complement of the DSKCHG# input.
Bit 6-3: These bits are always a logic 1 during a read.
DRATE1 DRATE0 (Bit 2, 1):
These two bits select the data rate of the FDC. Refer to the DR register bits 1 and 0 for the settings
corresponding to the individual data rates.
HIGH DENS# (Bit 0):
0 500 KB/S or 1 MB/S data rate (high density FDD)
1 250 KB/S or 300 KB/S data rate

In the PS/2 Model 30 mode, the bit definitions are as follows:
1
2
3
4
5
6
7
0
DRATE0
DRATE1
DSKCHG
NOPREC
DMAEN
0
0
0
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 47 - Revision 1.0
DSKCHG (Bit 7):
This bit indicates the status of DSKCHG# input.
Bit 6-4: These bits are always a logic 1 during a read.
DMAEN (Bit 3):
This bit indicates the value of DO REGISTER bit 3.
NOPREC (Bit 2):
This bit indicates the value of CC REGISTER NOPREC bit.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
3.2.9 Configuration Control Register (CC Register) (Write base address + 7)
This register is used to control the data rate. In the PC/AT and PS/2 mode, the bit definitions are as
follows:
x
x
x
x
x
x
DRATE0
DRATE1
0
1
2
3
4
5
7
6
X: Reserved
Bit 7-2: Reserved. These bits should be set to 0.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
In the PS/2 Model 30 mode, the bit definitions are as follows:
1
2
3
4
5
6
7
0
DRATE0
DRATE1
NOPREC
X
X
X
X
X
X
:
Reserved
Bit 7-3: Reserved. These bits should be set to 0.
NOPREC (Bit 2):
This bit indicates no precompensation. It has no function and can be set by software.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 48 - Revision 1.0
4.
UART PORT
4.1
Universal Asynchronous Receiver/Transmitter (UART A, UART B)
The UARTs are used to convert parallel data into serial format on the transmit side and convert serial
data to parallel format on the receiver side. The serial format, in order of transmission and reception, is a
start bit, followed by five to eight data bits, a parity bit (if programmed) and one, one and half (five-bit
format only) or two stop bits. The UARTs are capable of handling divisors of 1 to 65535 and producing a
16x clock for driving the internal transmitter logic. Provisions are also included to use this 16x clock to
drive the receiver logic. The UARTs also support the MIDI data rate. Furthermore, the UARTs also
include complete modem control capability and a processor interrupt system that may be software
trailed to the computing time required to handle the communication link. The UARTs have a FIFO mode
to reduce the number of interrupts presented to the CPU. In each UART, there are 16-byte FIFOs for
both receive and transmit mode.
4.2
Register Address
4.2.1 UART Control Register (UCR) (Read/Write)
The UART
Control Register controls and defines the protocol for asynchronous data communications,
including data length, stop bit, parity, and baud rate selection.
1
2
3
4
5
6
7
0
Data length select bit 0 (DLS0)
Data length select bit 1(DLS1)
Multiple stop bits enable (MSBE)
Parity bit enable (PBE)
Even parity enable (EPE)
Parity bit fixed enable (PBFE)
Set silence enable (SSE)
Baudrate divisor latch access bit (BDLAB)
Bit 7: BDLAB. When this bit is set to a logical 1, designers can access the divisor (in 16-bit binary
format) from the divisor latches of the baudrate generator during a read or write operation. When
this bit is reset, the Receiver Buffer Register, the Transmitter Buffer Register, or the Interrupt
Control Register can be accessed.
Bit 6: SSE. A logical 1 forces the Serial Output (SOUT) to a silent state (a logical 0). Only IRTX is
affected by this bit; the transmitter is not affected.
Bit 5: PBFE. When PBE and PBFE of UCR are both set to a logical 1,
(1) if EPE is logical 1, the parity bit is fixed as logical 0 to transmit and check.
(2) if EPE is logical 0, the parity bit is fixed as logical 1 to transmit and check.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 49 - Revision 1.0
TABLE 4-1 UART Register Bit Map
Bit Number
Register Address Base
0
1
2
3
4
5
6
7
+ 0
BDLAB = 0
Receiver
Buffer
Register
(Read Only)
RBR
RX Data
Bit 0
RX Data
Bit 1
RX Data
Bit 2
RX Data
Bit 3
RX Data
Bit 4
RX Data
Bit 5
RX Data
Bit 6
RX Data
Bit 7
+ 0
BDLAB = 0
Transmitter
Buffer Register
(Write Only)
TBR
TX Data
Bit 0
TX Data
Bit 1
TX Data
Bit 2
TX Data
Bit 3
TX Data
Bit 4
TX Data
Bit 5
TX Data
Bit 6
TX Data
Bit 7
+ 1
BDLAB = 0
Interrupt Control
Register
ICR
RBR Data
Ready
Interrupt
Enable
(ERDRI)
TBR
Empty
Interrupt
Enable
(ETBREI)
USR
Interrupt
Enable
(EUSRI)
HSR
Interrupt
Enable
(EHSRI)
0
0
0
0
+ 2
Interrupt Status
Register
(Read Only)
ISR
"0" if
Interrupt
Pending
Interrupt
Status
Bit (0)
Interrupt
Status
Bit (1)
Interrupt
Status
Bit (2)**
0
0
FIFOs
Enabled
**
FIFOs
Enabled
**
+ 2
UART FIFO
Control
Register
(Write Only)
UFR
FIFO
Enable
RCVR
FIFO
Reset
XMIT
FIFO
Reset
DMA
Mode
Select
Reserved
Reversed
RX
Interrupt
Active Level
(LSB)
RX
Interrupt
Active Level
(MSB)
+ 3
UART Control
Register
UCR
Data
Length
Select
Bit 0
(DLS0)
Data
Length
Select
Bit 1
(DLS1)
Multiple
Stop Bits
Enable
(MSBE)
Parity
Bit
Enable
(PBE)
Even
Parity
Enable
(EPE)
Parity
Bit Fixed
Enable
PBFE)
Set
Silence
Enable
(SSE)
Baudrate
Divisor
Latch
Access Bit
(BDLAB)
+ 4
Handshake
Control
Register
HCR
Data
Terminal
Ready
(DTR)
Request
to
Send
(RTS)
Loopback
RI
Input
IRQ
Enable
Internal
Loopback
Enable
0
0
0
+ 5
UART Status
Register
USR
RBR Data
Ready
(RDR)
Overrun
Error
(OER)
Parity Bit
Error
(PBER)
No Stop
Bit
Error
(NSER)
Silent
Byte
Detected
(SBD)
TBR
Empty
(TBRE)
TSR
Empty
(TSRE)
RX FIFO
Error
Indication
(RFEI) **
+ 6
Handshake
Status Register
HSR
CTS
Toggling
(TCTS)
DSR
Toggling
(TDSR)
RI Falling
Edge
(FERI)
DCD
Toggling
(TDCD)
Clear
to Send
(CTS)
Data Set
Ready
(DSR)
Ring
Indicator
(RI)
Data Carrier
Detect
(DCD)
+ 7
User Defined
Register
UDR
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
+ 0
BDLAB = 1
Baudrate
Divisor Latch
Low
BLL
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
+ 1
BDLAB = 1
Baudrate
Divisor Latch
High
BHL
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
*: Bit 0 is the least significant bit. The least significant bit is the first bit serially transmitted or received.
**: These bits are always 0 in 16450 Mode.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 50 - Revision 1.0
Bit 4: EPE. This bit describes the number of logic 1's in the data word bits and parity bit only when bit 3
is programmed. When this bit is set, an even number of logic 1's are sent or checked. When the
bit is reset, an odd number of logic 1's are sent or checked.
Bit 3: PBE. When this bit is set, the position between the last data bit and the stop bit of the SOUT will
be stuffed with the parity bit at the transmitter. For the receiver, the parity bit in the same position
as the transmitter will be detected.
Bit 2: MSBE. This bit defines the number of stop bits in each serial character that is transmitted or
received.
(1) If MSBE is set to a logical 0, one stop bit is sent and checked.
(2) If MSBE is set to a logical 1, and data length is 5 bits, one and a half stop bits are sent and
checked.
(3) If MSBE is set to a logical 1, and data length is 6, 7, or 8 bits, two stop bits are sent and
checked.
Bits 0 and 1: DLS0, DLS1. These two bits define the number of data bits that are sent or checked in
each serial character.

TABLE 4-2 WORD LENGTH DEFINITION
DLS1
DLS0
DATA LENGTH
0
0
5 bits
0
1
6 bits
1
0
7 bits
1
1
8 bits
4.2.2 UART Status Register (USR) (Read/Write)
This 8-bit register provides information about the status of the data transfer during communication.
1
2
3
4
5
6
7
0
RBR Data ready (RDR)
Overrun error (OER)
Parity bit error (PBER)
No stop bit error (NSER)
Silent byte detected (SBD)
Transmitter Buffer Register empty (TBRE)
Transmitter Shift Register empty (TSRE)
RX FIFO Error Indication (RFEI)
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 51 - Revision 1.0
Bit 7: RFEI. In 16450 mode, this bit is always set to a logic 0. In 16550 mode, this bit is set to a logic 1
when there is at least one parity bit error, no stop bit error or silent byte detected in the FIFO. In
16550 mode, this bit is cleared by reading from the USR if there are no remaining errors left in the
FIFO.
Bit 6: TSRE. In 16450 mode, when TBR and TSR are both empty, this bit will be set to a logical 1. In
16550 mode, if the transmit FIFO and TSR are both empty, it will be set to a logical 1. Other
thanthese two cases, this bit will be reset to a logical 0.
Bit 5: TBRE. In 16450 mode, when a data character is transferred from TBR to TSR, this bit will be set to
a logical 1. If ETREI of ICR is a logical 1, an interrupt will be generated to notify the CPU to write
the next data. In 16550 mode, this bit will be set to a logical 1 when the transmit FIFO is empty. It
will be reset to a logical 0 when the CPU writes data into TBR or FIFO.
Bit 4: SBD. This bit is set to a logical 1 to indicate that received data are kept in silent state for a full
word time, including start bit, data bits, parity bit, and stop bits. In 16550 mode, it indicates the
same condition for the data on top of the FIFO. When the CPU reads USR, it will clear this bit to a
logical 0.
Bit 3: NSER. This bit is set to a logical 1 to indicate that the received data have no stop bit. In 16550
mode, it indicates the same condition for the data on top of the FIFO. When the CPU reads USR,
it will clear this bit to a logical 0.
Bit 2: PBER. This bit is set to a logical 1 to indicate that the parity bit of received data is wrong. In 16550
mode, it indicates the same condition for the data on top of the FIFO. When the CPU reads USR,
it will clear this bit to a logical 0.
Bit 1: OER. This bit is set to a logical 1 to indicate received data have been overwritten by the next
received data before they were read by the CPU. In 16550 mode, it indicates the same condition
instead of FIFO full. When the CPU reads USR, it will clear this bit to a logical 0.
Bit 0: RDR. This bit is set to a logical 1 to indicate received data are ready to be read by the CPU in the
RBR or FIFO. After no data are left in the RBR or FIFO, the bit will be reset to a logical 0.
4.2.3 Handshake Control Register (HCR) (Read/Write)
This register controls the pins of the UART used for handshaking peripherals such as modem, and
controls the diagnostic mode of the UART.
0
0
0
0
1
2
3
4
5
6
7
Data terminal ready (DTR)
Request to send (RTS)
Loopback RI input
IRQ enable
Internal loopback enable
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Bit 4: When this bit is set to a logical 1, the UART enters diagnostic mode by an internal loopback, as
follows:
(1) SOUT is forced to logical 1, and SIN is isolated from the communication link instead of the
TSR.
(2) Modem output pins are set to their inactive state.
(3) Modem input pins are isolated from the communication link and connect internally as DTR
(bit 0 of HCR)
DSR, RTS ( bit 1 of HCR)
CTS , Loopback RI input ( bit 2 of HCR)
RI and IRQ enable ( bit 3 of HCR)
DCD .
Aside from the above connections, the UART operates normally. This method allows the CPU
to test the UART in a convenient way.
Bit 3: The UART interrupt output is enabled by setting this bit to a logic 1. In the diagnostic mode this bit
is internally connected to the modem control input DCD .
Bit 2: This bit is used only in the diagnostic mode. In the diagnostic mode this bit is internally
connected to the modem control input RI .
Bit 1: This bit controls the RTS output. The value of this bit is inverted and output to RTS .
Bit 0: This bit controls the DTR output. The value of this bit is inverted and output to DTR .
4.2.4 Handshake Status Register (HSR) (Read/Write)
This register reflects the current state of four input pins for handshake peripherals such as a modem and
records changes on these pins.
1
2
3
4
5
6
7
0
RI falling edge (FERI)
Clear to send (CTS)
Data set ready (DSR)
Ring indicator (RI)
Data carrier detect (DCD)
CTS toggling (TCTS)
DSR toggling (TDSR)
DCD toggling (TDCD)
Bit 7: This bit is the opposite of the DCD input. This bit is equivalent to bit 3 of HCR in loopback mode.
Bit 6: This bit is the opposite of the RI input. This bit is equivalent to bit 2 of HCR in loopback mode.
Bit 5: This bit is the opposite of the DSR input. This bit is equivalent to bit 0 of HCR in loopback mode.
Bit 4: This bit is the opposite of the CTS input. This bit is equivalent to bit 1 of HCR in loopback mode.
Bit 3: TDCD. This bit indicates that the DCD pin has changed state after HSR was read by the
CPU.
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Bit 2: FERI. This bit indicates that the RI pin has changed from low to high state after HSR was read
by the CPU.
Bit 1: TDSR. This bit indicates that the DSR pin has changed state after HSR was read by the CPU.
Bit 0: TCTS. This bit indicates that the CTS pin has changed state after HSR was read.
4.2.5 UART FIFO Control Register (UFR) (Write only)
This register is used to control the FIFO functions of the UART.
1
2
3
4
5
6
7
0
FIFO enable
Receiver FIFO reset
Transmitter FIFO reset
DMA mode select
Reserved
Reserved
RX interrupt active level (LSB)
RX interrupt active level (MSB)
Bit 6, 7: These two bits are used to set the active level for the receiver FIFO interrupt. For example, if the
interrupt active level is set as 4 bytes, once there are more than 4 data characters in the receiver
FIFO, the interrupt will be activated to notify the CPU to read the data from the FIFO.
TABLE 4-3 FIFO TRIGGER LEVEL
BIT 7
BIT 6
RX FIFO INTERRUPT ACTIVE LEVEL (BYTES)
0
0
01
0
1
04
1
0
08
1
1
14

Bit 4, 5: Reserved
Bit 3: When this bit is programmed to logic 1, the DMA mode will change from mode 0 to mode 1 if
UFR bit 0 = 1.
Bit 2: Setting this bit to a logical 1 resets the TX FIFO counter logic to initial state. This bit will clear to a
logical 0 by itself after being set to a logical 1.
Bit 1: Setting this bit to a logical 1 resets the RX FIFO counter logic to initial state. This bit will clear to a
logical 0 by itself after being set to a logical 1.
Bit 0: This bit enables the 16550 (FIFO) mode of the UART. This bit should be set to a logical 1 before
other bits of UFR are programmed.
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4.2.6 Interrupt Status Register (ISR) (Read only)
This register reflects the UART interrupt status, which is encoded by different interrupt sources into 3
bits.
1
2
3
4
5
6
7
0
0 if interrupt pending
Interrupt Status bit 0
Interrupt Status bit 1
Interrupt Status bit 2
FIFOs enabled
FIFOs enabled
0
0
Bit 7, 6: These two bits are set to a logical 1 when UFR bit 0 = 1.
Bit 5, 4: These two bits are always logic 0.
Bit 3: In 16450 mode, this bit is 0. In 16550 mode, both bit 3 and 2 are set to a logical 1 when a time-out
interrupt is pending.
Bit 2, 1: These two bits identify the priority level of the pending interrupt, as shown in the table below.
Bit 0: This bit is a logical 1 if there is no interrupt pending. If one of the interrupt sources has occurred,
this bit will be set to a logical 0.

TABLE 4-4 INTERRUPT CONTROL FUNCTION
ISR
INTERRUPT SET AND FUNCTION
Bit
3
Bit
2
Bit
1
Bit
0
Interrupt
priority
Interrupt Type
Interrupt Source
Clear Interrupt
0
0
0
1
-
-
No Interrupt pending
-
0
1
1
0
First
UART Receive
Status
1. OER = 1 2. PBER =1
3. NSER = 1 4. SBD = 1
Read USR
0
1
0
0
Second
RBR Data Ready
1. RBR data ready
2. FIFO interrupt active level
reached
1. Read RBR
2. Read RBR until FIFO
data under active level
1
1
0
0
Second
FIFO Data Timeout
Data present in RX FIFO for 4
characters period of time since
last access of RX FIFO.
Read RBR
0
0
1
0
Third
TBR Empty
TBR empty
1. Write data into TBR
2. Read ISR (if priority is
third)
0
0
0
0
Fourth
Handshake status
1. TCTS = 1 2. TDSR = 1
3. FERI = 1 4. TDCD = 1
Read HSR
** Bit 3 of ISR is enabled when bit 0 of UFR is logical 1.
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4.2.7 Interrupt Control Register (ICR) (Read/Write)
This 8-bit register allows the five types of controller interrupts to activate the interrupt output signal
separately. The interrupt system can be totally disabled by resetting bits 0 through 3 of the Interrupt
Control Register (ICR). A selected interrupt can be enabled by setting the appropriate bits of this
register to a logical 1.
0
0
0
1
2
3
4
5
6
7
0
0
RBR data ready interrupt enable (ERDRI)
TBR empty interrupt enable (ETBREI)
UART receive status interrupt enable (EUSRI)
Handshake status interrupt enable (EHSRI)
Bit 7-4: These four bits are always logic 0.
Bit 3: EHSRI. Setting this bit to a logical 1 enables the handshake status register interrupt.
Bit 2: EUSRI. Setting this bit to a logical 1 enables the UART status register interrupt.
Bit 1: ETBREI. Setting this bit to a logical 1 enables the TBR empty interrupt.
Bit 0: ERDRI. Setting this bit to a logical 1 enables the RBR data ready interrupt.
4.2.8 Programmable Baud Generator (BLL/BHL) (Read/Write)
Two 8-bit registers, BLL and BHL, compose a programmable baud generator that uses 24 MHz to
generate a 1.8461 MHz frequency and divides it by a divisor from 1 to 2
16
-1. The output frequency of the
baud generator is the baud rate multiplied by 16, and this is the base frequency for the transmitter and
receiver. The table in the next page illustrates the use of the baud generator with a frequency of 1.8461
MHz. In high-speed UART mode (refer to CR0C bit7 and CR0C bit6), the programmable baud generator
directly uses 24 MHz and the same divisor as the normal speed divisor. In high-speed mode, the data
transmission rate can be as high as 1.5M bps.
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4.2.9 User-defined Register (UDR) (Read/Write)
This is a temporary register that can be accessed and defined by the user.
TABLE 4-5 BAUD RATE TABLE
BAUD RATE FROM DIFFERENT PRE-DIVIDER
Pre-Div: 13
1.8461M Hz
Pre-Div:1.625
14.769M Hz
Pre-Div: 1.0
24M Hz
Decimal divisor used
to generate 16X clock
Error Percentage between
desired and actual
50
400
650
2304
**
75
600
975
1536
**
110
880
1430
1047
0.18%
134.5
1076
1478.5
857
0.099%
150
1200
1950
768
**
300
2400
3900
384
**
600
4800
7800
192
**
1200
9600
15600
96
**
1800
14400
23400
64
**
2000
16000
26000
58
0.53%
2400
19200
31200
48
**
3600
28800
46800
32
**
4800
38400
62400
24
**
7200
57600
93600
16
**
9600
76800
124800
12
**
19200
153600
249600
6
**
38400
307200
499200
3
**
57600
460800
748800
2
**
115200
921600
1497600
1
**
** The percentage error for all baud rates, except where indicated otherwise, is 0.16%.
Note. Pre-Divisor is determined by CRF0 of UART A and B.
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Revision 1.0
5. CIR RECEIVER PORT
5.1 CIR Registers
5.1.1 Bank0.Reg0 - Receiver Buffer Registers (RBR) (Read)
Receiver Buffer Register is read only. When the CIR pulse train has been detected and passed by the
internal signal filter, the data samped and shifted into shifter register will write into Receiver Buffer
Register. In the CIR, this port is only supports PIO mode and the address port is defined in the PnP.
5.1.2 Bank0.Reg1 - Interrupt Control Register (ICR)
Power on default <7:0> = 00000000 binary
Bit
Name
Read/Write
Description
7
EN_GLBI
Read/Write Enable Global Interrupt. Write 1, enable interrupt. Write 0,
disable global interrupt.
6-3
Reserved
-
Reserved
2
EN_TMR_I
Read/Write Enable Timer Interrupt.
1
En_LSR_I
Read/Write Enable Line-Status-Register interrupt.
0
EN_RX_I
Read/Write Receiver Thershold-Level Interrupt Enable.
5.1.3 Bank0.Reg2 - Interrupt Status Register (ISR)
Power on default <7:0> = 00000000 binary
Bit
Name
Read/Write
Description
7-3
Reserved
Reserved
2
TMR_I
Read Only
Timer Interrupt. Set to 1 when timer count to 0. This bit will
be affected by (1) the timer registers are defined in
Bank4.Reg0 and Bank1.Reg0~1, (2) EN_TMR(Enable
Timer, in Bank0.Reg3.Bit2) should be set to 1, (3)
ENTMR_I (Enable Timer Interrupt, in Bank0.Reg1.Bit2)
should be set to 1.
1
LSR_I
Read Only
Line-Status-Register interrupt. Set to 1 when overrun, or
parity bit, or stop bit, or silent byte detected error in the
Line Status Register (LSR) sets to 1. Clear to 0 when LSR
is read.
0
RXTH_I
Read Only
Receiver Thershold-Level Interrupt. Set to 1 when (1) the
Receiver Buffer Register (RBR) is equal
or
larger than the
threshold level, (2) RBR occurs time-out if the receiver
buffer register has valid data and below the threshold level.
Clear to 0 when RBR is less than threshold level from
reading RBR.
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5.1.4 Bank0~3.Reg3 - CIR Control Register 0/Bank Select Register (CTR0/BSR) (BANK0~3)
Power on default <7:0> = 00000000 binary
Bit
Name
Read/Write
Description
7-6
BNK_SEL<1:0>
Read/Write Bank Select Register. These two bits are shared same
address so that
Bank Select Register (BSR)
can be
programmed to desired Bank in any Bank.
BNK_SEL<1:0> = 00 Select Bank 0.
BNK_SEL<1:0> = 01 Select Bank 1.
BNK_SEL<1:0> = Reserved.
BNK_SEL<1:0> = Reserved.
5-4
RXFTL1/0
Read/Write Receiver FIFO Threshold Level. It is to determine the
RXTH_I to become 1 when the Receiver FIFO Threshold
Level is equal or larger than the defined value shown as
follow.
RXFTL<1:0> = 00 -- 1 byte
RXFTL<1:0> = 01 -- 4 bytes
RXFTL<1:0> = 10 -- 8 bytes
RXFTL<1:0> = 11 -- 14 bytes
3
TMR_TST
Read/Write Timer Test. Write to 1, then reading the TMRL/TMRH will
return the programmed values of TMRL/TMRH, that is,
does not return down count counter value. This bit is for
test timer register.
2
EN_TMR
Read/Write Enable timer. Write to 1, enable the timer
1
RXF_RST
Read/Write Setting this bit to a logical 1 resets the RX FIFO counter
logic to initial state. This bit will clear to a logical 0 by itself
after being set to a logical 1.
0
TMR_CLK
Read/Write Timer input clock.
Winbond test register
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5.1.5 Bank0.Reg4 - CIR Control Register (CTR)
Power on default <7:0> = 0010,1001 binary
Bit
Name
Read/Write
Description
7-5
RX_FR<2:0>
Read/Write Receiver Frequency Range 2~0. These bits select the input
frequency of the receiver ranges. For the input signal, that
is through a band pass filter, i.e., the frequency of the input
signal is located at this defined range then the signal will
be received.
4-0
RX_FSL<4:0>
Read/Write Receiver Frequency Select 4~0. Select the receiver
operation frequency.

Table: Low Frequency range select of receiver.
RX_FR2~0 (Low Frequency)
001
010
011
RX_FSL4~0
Min.
Max.
Min.
Max.
Min.
Max.
00010
26.1
29.6
24.7
31.7
23.4
34.2
00011
28.2
32.0
26.7
34.3
25.3
36.9
00100
29.4
33.3
27.8
35.7
26.3
38.4
00101
30.0
34.0
28.4
36.5
26.9
39.3
00110
31.4
35.6
29.6
38.1
28.1
41.0
00111
32.1
36.4
30.3
39.0
28.7
42.0
01000
32.8
37.2
31.0
39.8
29.4
42.9
01001
33.6*
38.1*
31.7
40.8
30.1
44.0
01011
34.4
39.0
32.5
41.8
30.8
45.0
01100
36.2
41.0
34.2
44.0
32.4
47.3
01101
37.2
42.1
35.1
45.1
33.2
48.6
01111
38.2
43.2
36.0
46.3
34.1
49.9
10000
40.3
45.7
38.1
49.0
36.1
52.7
10010
41.5
47.1
39.2
50.4
37.2
54.3
10011
42.8
48.5
40.4
51.9
38.3
56.0
10101
44.1
50.0
41.7
53.6
39.5
57.7
10111
45.5
51.6
43.0
55.3
40.7
59.6
11010
48.7
55.2
46.0
59.1
43.6
63.7
11011
50.4
57.1
47.6
61.2
45.1
65.9
11101
54.3
61.5
51.3
65.9
48.6
71.0
Note that the other non-defined values are reserved.
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5.1.6 Bank0.Reg5 - UART Line Status Register (USR)
Power on default <7:0> = 0000,0000 binary
Bit
Name
Read/Write
Description
7-3
Reserved
-
-
2
RX_TO
Read/Write Set to 1 when receiver FIFO
or
frame status FIFO occurs
time-out. Read this bit will be cleared.
1
OV_ERR
Read/Write Received FIFO overrun. Read to clear.
0
RDR
Read/Write This bit is set to a logical 1 to indicate received data are
ready to be read by the CPU in the RBR or FIFO. After no
data are left in the RBR or FIFO, the bit will be reset to a
logical 0.
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5.1.7 Bank0.Reg6 - Remote Infrared Config Register (RIR_CFG)
Power on default <7:0> = 0000,0000 binary
Bit
Name
Read/Write
Description
7-6
SMPSEL<1:0>
Read/Write Sampling Mode Select. Select internal decoder
methodology from the internal filter. Selected decoder
mode will determine the receive data format. The sampling
mode is shown as bellow:
SMPSEL<1:0> = 00 T-Period Sample Mode.
SMPSEL<1:0> = 01 Over-Sampling Mode.
SMPSEL<1:0> = 10 Over-Sampling with re-sync.
SMPSEL<1:0> = 11 FIFO Test Mode.
The T-period code format is defined as follows.

The Bit value is set to 0, then the high pulse will be
received. The Bit value is set to 1, then no energy will be
received. The opposite results will be generated when the
bit RXINV (Bank0.Reg6.Bit0) is set to 1.
5-4
LP_SL<1:0>
Read/Write Low pass filter source selcetion.
LP_SL<1:0> = 00 Select raw IRRX signal.
LP_SL<1:0> = 01 Select R.B.P. signal
LP_SL<1:0> = 10 Select D.B.P. signal.
LP_SL<1:0> = 11 Reserved.
3-2
RXDMSL<1:0>
Read/Write Receiver Demodulation Source Selection.
RXDMSL<1:0> = 00 select B.P. and L.P. filter.
RXDMSL<1:0> = 01 select B.P. but not L.P.
RXDMSL<1:0> = 10 Reserved.
RXDMSL<1:0> = 11 do not pass demodulation.
1
PRE_DIV
Read/Write Baud Rate Pre-divisor. Set to 1, the baud rate generator
input clock is set to 1.8432M Hz which is set to pre-divisor
into 13. When set to 0, the pre-divisor is set to 1, that is,
the input clock of baud rate generator is set to 24M Hz.
0
RXINV
Read/Write Receiving Signal Invert. Write to 1, Invert the receiving
signal.
B7 B6 B5 B4
B2 B1 B0
B3
Bit value
(Number of bits) - 1
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5.1.8 Bank0.Reg7 - User Defined Register (UDR/AUDR)
Power on default <7:0> = 0000,0000 binary
Bit
Name
Read/Write
Description
7
RXACT
Read/Write Receive Active. Set to 1 whenever a pulse or pulse-train is
detected by the receiver. If a 1 is written into the bit
position, the bit is cleared and the receiver is de-actived.
When this bit is set, the receiver samples the IR input
continuously at the programmed baud rate and transfers
the data to the receiver FIFO.
6
RX_PD
Read Only
Set to 1 whenever a pulse or pulse-train (modulated pulse)
is detected by the receiver. Can be used by the sofware to
detect idle condition Cleared Upon Read.
5
Reserved
-
-
4-0
FOLVAL
Read Only
FIFO Level Value. Indicate that how many bytes are there
in the current received FIFO. Can read these bits then get
the FIFO level value and successively read RBR by the
prior value.
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5.1.9 Bank1.Reg0~1 - Baud Rate Divisor Latch (BLL/BHL)
The two registers of BLL and BHL are baud rate divisor latch in the legacy UART/SIR/ASK-IR mode.
Read/Write these registers, if set in Advanced UART mode, will occur backward operation, that is, will
go to legacy UART mode and clear some register values shown table as follows.

TABLE :BAUD RATE TABLE
BAUD RATE USING 24 MHZ TO GENERATE 1.8461 MHZ
Desired Baud Rate
Decimal divisor used to
generate 16X clock
Percent error difference between
desired and actual
50
2304
**
75
1536
**
110
1047
0.18%
134.5
857
0.099%
150
768
**
300
384
**
600
192
**
1200
96
**
1800
64
**
2000
58
0.53%
2400
48
**
3600
32
**
4800
24
**
7200
16
**
9600
12
**
19200
6
**
38400
3
**
57600
2
**
115200
1
**
1.5M
1
Note 1
0%
Note 1: Only use in high speed mode, when Bank0.Reg6.Bit7 is set.
** The percentage error for all baud rates, except where indicated otherwise, is 0.16%
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Revision 1.0
5.1.10 Bank1.Reg2 - Version ID Regiister I (VID)
Power on default <7:0> = 0001,0000 binary
Bit
Name
Read/Write
Description
7-0
VID
Read Only
Version ID, default is set to 0x10.
5.1.11 Bank0~3.Reg3 - CIR Control Register 0/Bank Select Register (CTR0/BSR) (BANK0~3)
This register is defined same as in Bank0.Reg3.
5.1.12 Bank1.Reg4 - Timer Low Byte Register (TMRL)
Power on default <7:0> = 0000,0000 binary
Bit
Name
Read/Write
Description
7-0
TMRL
Read/Write Timer Low Byte Register. This is a 12-bit timer (another 4-
bit is defined in Bank1.Reg5) which resolution is 1 ms, that
is, the programmed maximum time is 2
12
-1 ms. The timer
is a down-counter. The timer start down count when the bit
EN_TMR (Enable Timer) of Bank0.Reg2. is set to 1. When
the timer down count to
zero
and EN_TMR=1, the TMR_I is
set to 1. When the counter down count to zero, a new
initial value will be re-loaded into timer counter.
5.1.13 Bank1.Reg5 - Timer High Byte Register (TMRH)
Power on default <7:0> = 0000,0000 binary
Bit
Name
Read/Write
Description
7-4
Reserved
Reserved.
3-0
TMRH
Read/Write Timer High Byte Register. See Bank1.Reg4.
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6. PARALLEL PORT
6.1 Printer Interface Logic
The parallel port of the W83627HF makes possible the attachment of various devices that accept eight
bits of parallel data at standard TTL level. The W83627HF supports an IBM XT/AT compatible parallel
port (SPP), bi-directional parallel port (BPP), Enhanced Parallel Port (EPP), Extended Capabilities
Parallel Port (ECP), Extension FDD mode (EXTFDD), Extension 2FDD mode (EXT2FDD) on the parallel
port. Refer to the configuration registers for more information on disabling, power-down, and on selecting
the mode of operation.
Table 6-1 shows the pin definitions for different modes of the parallel port.
TABLE 6-1-1
PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
HOST
CONNECTOR
PIN NUMBER
OF W83627HF
PIN
ATTRIBUTE
SPP
EPP
ECP
1
36
O
nSTB
nWrite
nSTB, HostClk
2
2-9
31-26, 24-23
I/O
PD<0:7>
PD<0:7>
PD<0:7>
10
22
I
nACK
Intr
nACK, PeriphClk
2
11
21
I
BUSY
nWait
BUSY, PeriphAck
2
12
19
I
PE
PE
PEerror, nAckReverse
2
13
18
I
SLCT
Select
SLCT, Xflag
2
14
35
O
nAFD
nDStrb
nAFD, HostAck
2
15
34
I
nERR
nError
nFault
1
, nPeriphRequest
2
16
33
O
nINIT
nInit
nINIT
1
, nReverseRqst
2
17
32
O
nSLIN
nAStrb
nSLIN
1
, ECPMode
2
Notes:
n<name > : Active Low
1. Compatible Mode
2. High Speed Mode
3. For more information, refer to the IEEE 1284 standard.
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TABLE 6-1-2
PARALLEL PORT CONNECTOR AND PIN DEFINITIONS
HOST
CONNECTOR
PIN NUMBER OF
W83627HF
PIN
ATTRIBUTE
SPP
PIN
ATTRIBUTE
EXT2FDD
PIN
ATTRIBUTE
EXTFDD
1
36
O
nSTB
---
---
---
---
2
31
I/O
PD0
I
INDEX2#
I
INDEX2#
3
30
I/O
PD1
I
TRAK02#
I
TRAK02#
4
29
I/O
PD2
I
WP2#
I
WP2#
5
28
I/O
PD3
I
RDATA2#
I
RDATA2#
6
27
I/O
PD4
I
DSKCHG2#
I
DSKCHG2#
7
26
I/O
PD5
---
---
---
---
8
24
I/O
PD6
OD
MOA2#
---
---
9
23
I/O
PD7
OD
DSA2#
---
---
10
22
I
nACK
OD
DSB2#
OD
DSB2#
11
21
I
BUSY
OD
MOB2#
OD
MOB2#
12
19
I
PE
OD
WD2#
OD
WD2#
13
18
I
SLCT
OD
WE2#
OD
WE2#
14
35
O
nAFD
OD
RWC2#
OD
RWC2#
15
34
I
nERR
OD
HEAD2#
OD
HEAD2#
16
33
O
nINIT
OD
DIR2#
OD
DIR2#
17
32
O
nSLIN
OD
STEP2#
OD
STEP2#
6.2 Enhanced Parallel Port (EPP)
TABLE 6-2
PRINTER MODE AND EPP REGISTER ADDRESS
A2
A1
A0
REGISTER
NOTE
0
0
0
Data port (R/W)
1
0
0
1
Printer status buffer (Read)
1
0
1
0
Printer control latch (Write)
1
0
1
0
Printer control swapper (Read)
1
0
1
1
EPP address port (R/W)
2
1
0
0
EPP data port 0 (R/W)
2
1
0
1
EPP data port 1 (R/W)
2
1
1
0
EPP data port 2 (R/W)
2
1
1
1
EPP data port 2 (R/W)
2
Notes:
1. These registers are available in all modes.
2. These registers are available only in EPP mode.
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6.2.1 Data Swapper
The system microprocessor can read the contents of the printer's data latch by reading the data
swapper.
6.2.2 Printer Status Buffer
The system microprocessor can read the printer status by reading the address of the printer status
buffer. The bit definitions are as follows:
1
1
1
2
3
5
4
6
7
0
TMOUT
ERROR
SLCT
PE
BUSY
ACK
Bit 7: This signal is active during data entry, when the printer is off-line during printing, when the print
head is changing position, or during an error state. When this signal is active, the printer is busy
and cannot accept data.
Bit 6: This bit represents the current state of the printer's
ACK#
signal. A 0 means the printer has
received a character and is ready to accept another. Normally, this signal will be active for
approximately 5
microseconds before
BUSY#
stops.
Bit 5: Logical 1 means the printer has detected the end of paper.
Bit 4: Logical 1 means the printer is selected.
Bit 3: Logical 0 means the printer has encountered an error condition.
Bit 1, 2: These two bits are not implemented and are logic one during a read of the status register.
Bit 0: This bit is valid in EPP mode only. It indicates that a 10
S time-out has occurred on the EPP
bus. A logic 0 means that no time-out error has occurred; a logic 1 means that a time-out error
has been detected. Writing a logic 1 to this bit will clear the time-out status bit; writing a logic 0
has no effect.
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6.2.3 Printer Control Latch and Printer Control Swapper
The system microprocessor can read the contents of the printer control latch by reading the printer
control swapper. Bit definitions are as follows:
1
1
1
2
3
4
5
6
7
0
STROBE
AUTO FD
SLCT IN
IRQ ENABLE
DIR
INIT
Bit 7, 6: These two bits are a logic one during a read. They can be written.
Bit 5: Direction control bit
When this bit is a logic 1, the parallel port is in input mode (read); when it is a logic 0, the parallel
port is in output mode (write). This bit can be read and written. In SPP mode, this bit is invalid
and fixed at zero.
Bit 4: A 1 in this position allows an interrupt to occur when
ACK#
changes from low to high.
Bit 3: A 1 in this bit position selects the printer.
Bit 2: A 0 starts the printer (50 microsecond pulse, minimum).
Bit 1: A 1 causes the printer to line-feed after a line is printed.
Bit 0: A 0.5 microsecond minimum high active pulse clocks data into the printer. Valid data must be
present for a minimum of 0.5 microseconds before and after the strobe pulse.
6.2.4 EPP Address Port
The address port is available only in EPP mode. Bit definitions are as follows:
1
2
3
4
5
6
7
0
PD0
PD1
PD2
PD3
PD5
PD4
PD6
PD7
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The contents of DB0-DB7 are buffered (non-inverting) and output to ports PD0-PD7 during a write
operation. The leading edge of IOW#
c
auses an EPP address write cycle to be performed, and the
trailing edge of IOW#
latches the data for the duration of the EPP write cycle.
PD0-PD7 ports are read during a read operation. The leading edge of IOR#
causes an EPP address read
cycle to be performed and the data to be output to the host CPU.
6.2.5 EPP Data Port 0-3
These four registers are available only in EPP mode. Bit definitions of each data port are as follows:
1
2
3
4
5
6
7
0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
When accesses are made to any EPP data port, the contents of DB0-DB7 are buffered (non-inverting)
and output to the ports PD0-PD7 during a write operation. The leading edge of IOW#
causes an EPP
data write cycle to be performed, and the trailing edge of IOW#
latches the data for the duration of the
EPP write cycle.
During a read operation, ports PD0-PD7 are read, and the leading edge of
IOR#
causes an EPP read
cycle to be performed and the data to be output to the host CPU.
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6.2.6 Bit Map of Parallel Port and EPP Registers
REGISTER
7
6
5
4
3
2
1
0
Data Port (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
Status Buffer (Read)
BUSY# ACK#
PE
SLCT
ERROF#
1
1
TMOUT
Control Swapper
(Read)
1
1
1
IRQEN
SLIN
INIT#
AUTOFD#
STROBE#
Control Latch (Write)
1
1
DIR
IRQ
SLIN
INIT#
AUTOFD#
STROBE#
EPP Address Port R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
EPP Data Port 0 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
EPP Data Port 1 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
EPP Data Port 2 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
EPP Data Port 3 (R/W)
PD7
PD6
PD
5
PD4
PD3
PD2
PD1
PD0
6.2.7 EPP Pin Descriptions
EPP NAME
TYPE
EPP DESCRIPTION
nWrite
O
Denotes an address or data read or write operation.
PD<0:7>
I/O
Bi-directional EPP address and data bus.
Intr
I
Used by peripheral device to interrupt the host.
nWait
I
Inactive to acknowledge that data transfer is completed. Active to indicate
that the device is ready for the next transfer.
PE
I
Paper end; same as SPP mode.
Select
I
Printer selected status; same as SPP mode.
nDStrb
O
This signal is active low. It denotes a data read or write operation.
nError
I
Error; same as SPP mode.
nInits
O
This signal is active low. When it is active, the EPP device is reset to its
initial operating mode.
nAStrb
O
This signal is active low. It denotes an address read or write operation.
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6.2.8 EPP Operation
When the EPP mode is selected in the configuration register, the standard and bi-directional modes are
also available. The PDx bus is in the standard or bi-directional mode when no EPP read, write, or
address cycle is currently being executed. In this condition all output signals are set by the SPP Control
Port and the direction is controlled by DIR of the Control Port.
A watchdog timer is required to prevent system lockup. The timer indicates that more than 10
S have
elapsed from the start
of the EPP
cycle to the time
WAIT#
is deasserted. The current EPP cycle is
aborted when a time-out occurs. The time-out condition is indicated in Status bit 0.
6.2.8.1 EPP Operation
The EPP operates on a two-phase cycle. First, the host selects the register within the device for
subsequent operations. Second, the host performs a series of read and/or write byte operations to the
selected register. Four operations are supported on the EPP: Address Write, Data Write, Address Read,
and Data Read. All operations on the EPP device are performed asynchronously.
6.2.8.2 EPP Version 1.9 Operation
The EPP read/write operation can be completed under the following conditions:
a. If the nWait is active low, when the read cycle (nWrite inactive high, nDStrb/nAStrb active low) or write
cycle (nWrite active low, nDStrb/nAStrb active low) starts, the read/write cycle proceeds normally and
will be completed when nWait goes inactive high.
b. If nWait is inactive high, the read/write cycle will not start. It must wait until nWait changes to active
low, at which time it will start as described above.
6.2.8.3 EPP Version 1.7 Operation
The EPP read/write cycle can start without checking whether nWait is active or inactive. Once the
read/write cycle starts, however, it will not terminate until nWait changes from active low to inactive high.
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6.3 Extended Capabilities Parallel (ECP) Port
This
port is software and hardware compatible with existing parallel ports, so it may be used as a
standard printer mode if ECP is not required. It provides an automatic high burst-bandwidth channel that
supports DMA for ECP in both the forward (host to peripheral) and reverse (peripheral to host) directions.
Small FIFOs are used in both forward and reverse directions to improve the maximum bandwidth
requirement. The size of the FIFO is 16 bytes. The ECP port supports an automatic handshake for the
standard parallel port to improve compatibility mode transfer speed.
The ECP port supports run-length-encoded (RLE) decompression (required) in hardware. Compression is
accomplished by counting identical bytes and transmitting an RLE byte that indicates how many times
the next byte is to be repeated. Hardware support for compression is optional.
For more information about the ECP Protocol, refer to the Extended Capabilities Port Protocol and ISA
Interface Standard.
6.3.1 ECP Register and Mode Definitions
NAME
ADDRESS
I/O
ECP MODES
FUNCTION
data
Base+000h
R/W
000-001
Data Register
ecpAFifo
Base+000h
R/W
011
ECP FIFO (Address)
dsr
Base+001h
R
All
Status Register
dcr
Base+002h
R/W
All
Control Register
cFifo
Base+400h
R/W
010
Parallel Port Data FIFO
ecpDFifo
Base+400h
R/W
011
ECP FIFO (DATA)
tFifo
Base+400h
R/W
110
Test FIFO
cnfgA
Base+400h
R
111
Configuration Register A
cnfgB
Base+401h
R/W
111
Configuration Register B
ecr
Base+402h
R/W
All
Extended Control Register
Note: The base addresses are specified by CR23, which are determined by configuration register or hardware setting.
MODE
DESCRIPTION
000
SPP mode
001
PS/2 Parallel Port mode
010
Parallel Port Data FIFO mode
011
ECP Parallel Port mode
100
EPP mode (If this option is enabled in the CR9 and CR0 to select ECP/EPP mode)
101
Reserved
110
Test mode
111
Configuration mode
Note: The mode selection bits are bit 7-5 of the Extended Control Register.
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6.3.2 Data and ecpAFifo Port
Modes 000 (SPP) and 001 (PS/2) (Data Port)
During a write operation, the Data Register latches the contents of the data bus on the rising edge of the
input. The contents of this register are output to the PD0-PD7 ports. During a read operation, ports PD0-
PD7 are read and output to the host. The bit definitions are as follows:
7 6 5 4 3 2 1 0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
Mode 011 (ECP FIFO-Address/RLE)
A data byte written to this address is placed in the FIFO and tagged as an ECP Address/RLE. The
hardware at the ECP port transmits this byte to the peripheral automatically. The operation of this
register is defined only for the forward direction. The bit definitions are as follows:
7 6 5 4 3 2 1 0
Address or RLE
Address/RLE
6.3.3 Device Status Register (DSR)
These bits are at low level during a read of the Printer Status Register. The bits of this status register are
defined as follows:
7 6 5 4 3 2 1 0
nFault
Select
PError
nAck
nBusy
1
1
1
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Bit 7: This bit reflects the complement of the Busy input.
Bit 6: This bit reflects the nAck input.
Bit 5: This bit reflects the PError input.
Bit 4: This bit reflects the Select input.
Bit 3: This bit reflects the nFault input.
Bit 2-0: These three bits are not implemented and are always logic one during a read.
6.3.4 Device Control Register (DCR)
The bit definitions are as follows:
7 6 5 4 3 2 1 0
1
1
strobe
autofd
nInit
SelectIn
ackIntEn
Direction
Bit 6, 7: These two bits are logic one during a read and cannot be written.
Bit 5: This bit has no effect and the direction is always out if mode = 000 or mode = 010. Direction is
valid in all other modes.
0
the parallel port is in output mode.
1
the parallel port is in input mode.
Bit 4: Interrupt request enable. When this bit is set to a high level, it may be used to enable interrupt
requests from the parallel port to the CPU due to a low to high transition on the
ACK#
input.
Bit 3: This bit is inverted and output to the SLIN#
output.
0
The printer is not selected.
1
The printer is selected.
Bit 2: This bit is output to the
INIT#
output.
Bit 1: This bit is inverted and output to the
AFD#
output.
Bit 0: This bit is inverted and output to the
STB#
output.
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6.3.5 cFifo (Parallel Port Data FIFO) Mode = 010
This mode is defined only for the forward direction. The standard parallel port protocol is used by a
hardware handshake to the peripheral to transmit bytes written or DMAed from the system to this FIFO.
Transfers to the FIFO are byte aligned.
6.3.6 ecpDFifo (ECP Data FIFO) Mode = 011
When the direction bit is 0, bytes written or DMAed from the system to this FIFO are transmitted by a
hardware handshake to the peripheral using the ECP parallel port protocol. Transfers to the FIFO are
byte aligned.
When the direction bit is 1, data bytes from the peripheral are read under automatic hardware handshake
from ECP into this FIFO. Reads or DMAs from the FIFO will return bytes of ECP data to the system.
6.3.7 tFifo (Test FIFO Mode) Mode = 110
Data bytes may be read, written, or DMAed to or from the system to this FIFO in any direction. Data in
the tFIFO will not be transmitted to the parallel port lines. However, data in the tFIFO may be displayed
on the parallel port data lines.
6.3.8 cnfgA (Configuration Register A) Mode = 111
This register is a read-only register. When it is read, 10H is returned. This indicates to the system that
this is an 8-bit implementation.
6.3.9 cnfgB (Configuration Register B) Mode = 111
The bit definitions are as follows:
7 6 5 4 3 2 1 0
1 1 1
intrValue
compress
IRQx 0
IRQx 1
IRQx 2
Bit 7: This bit is read-only. It is at low level during a read. This means that this chip does not support
hardware RLE compression.
Bit 6: Returns the value on the ISA IRQ line to determine possible conflicts.
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Bit 5-3: Reflect the IRQ resource assigned for ECP port.
cnfgB[5:3]
IRQ resource
000
reflect other IRQ resources selected by PnP register (default)
001
IRQ7
010
IRQ9
011
IRQ10
100
IRQ11
101
IRQ14
110
IRQ15
111
IRQ5
Bit 2-0: These five bits are at high level during a read and can be written
.
6.3.10 ecr (Extended Control Register) Mode = all
This register controls the extended ECP parallel port functions. The bit definitions are follows:
7 6 5 4 3 2 1 0
empty
full
service Intr
dmaEn
nErrIntrEn
MODE
MODE
MODE
Bit 7-5: These bits are read/write and select the mode.
000
Standard Parallel Port mode. The FIFO is reset in this mode.
001
PS/2 Parallel Port mode. This is the same as 000 except that direction may be used
to tri-state the data lines and reading the data register returns the value on the data
lines and not the value in the data register.
010
Parallel Port FIFO mode. This is the same as 000 except that bytes are written or
DMAed to the FIFO. FIFO data are automatically transmitted using the standard
parallel port protocol. This mode is useful only when direction is 0.
011
ECP Parallel Port Mode. When the direction is 0 (forward direction), bytes placed into
the ecpDFifo and bytes written to the ecpAFifo are placed in a single FIFO and auto
transmitted to the peripheral using ECP Protocol. When the direction is 1 (reverse
direction), bytes are moved from the ECP parallel port and packed into bytes in the
ecpDFifo.
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100
Selects EPP Mode. In this mode, EPP is activated if the EPP mode is selected.
101
Reserved.
110
Test Mode. The FIFO may be written and read in this mode, but the data will not be
transmitted on the parallel port.
111
Configuration Mode. The confgA and confgB registers are accessible at 0x400 and
0x401 in this mode.
Bit 4: Read/Write (Valid only in ECP Mode)
1
Disables the interrupt generated on the asserting edge of nFault.
0
Enables an interrupt pulse on the high to low edge of nFault. If nFault is asserted
(interrupt) an interrupt will be generated and this bit is written from a 1 to 0.
Bit 3: Read/Write
1
Enables DMA.
0
Disables DMA unconditionally.
Bit 2: Read/Write
1
Disables DMA and all of the service interrupts.
0
Enables one of the following cases of interrupts. When one of the service interrupts
has occurred, the serviceIntr bit is set to a 1 by hardware. This bit must be reset to 0
to re-enable the interrupts. Writing a 1 to this bit will not cause an interrupt.
(a) dmaEn = 1: During DMA this bit is set to a 1 when terminal count is reached.
(b) dmaEn = 0 direction = 0: This bit is set to 1 whenever there are writeIntr Threshold
or more bytes free in the FIFO.
(c) dmaEn = 0 direction = 1: This bit is set to 1 whenever there are readIntr Threshold
or more valid bytes to be read from the FIFO.
Bit 1: Read only
0
The FIFO has at least 1 free byte.
1
The FIFO cannot accept another byte or the FIFO is completely full.
Bit 0: Read only
0
The FIFO contains at least 1 byte of data.
1
The FIFO is completely empty.
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6.3.11 Bit Map of ECP Port Registers
D7
D6
D5
D4
D3
D2
D1
D0
NOTE
data
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
ecpAFifo
Addr/RLE
Address or RLE field
2
dsr
nBusy
nAck
PError
Select
nFault
1
1
1
1
dcr
1
1
Directio
ackIntEn
SelectIn
nInit
autofd strobe
1
cFifo
Parallel Port Data FIFO
2
ecpDFifo
ECP Data FIFO
2
tFifo
Test FIFO
2
cnfgA
0
0
0
1
0
0
0
0
cnfgB
compress
intrValue
1
1
1
1
1
1
ecr
MODE
nErrIntrEn
dmaEn
serviceIntr
full
empty
Notes:
1. These registers are available in all modes.
2. All FIFOs use one common 16-byte FIFO.
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6.3.12 ECP Pin Descriptions
NAME
TYPE DESCRIPTION
nStrobe (HostClk)
O
The nStrobe registers data or address into the slave on the
asserting edge during write operations. This signal handshakes
with Busy.
PD<7:0>
I/O
These signals contains address or data or RLE data.
nAck (PeriphClk)
I
This signal indicates valid data driven by the peripheral when
asserted. This signal handshakes with nAutoFd in reverse.
Busy (PeriphAck)
I
This signal deasserts to indicate that the peripheral can accept
data. It indicates whether the data lines contain ECP command
information or data in the reverse direction. When in reverse
direction, normal data are transferred when Busy (PeriphAck) is
high and an 8-bit command is transferred when it is low.
PError (nAckReverse)
I
This signal is used to acknowledge a change in the direction of
the transfer (asserted = forward). The peripheral drives this signal
low to acknowledge nReverseRequest. The host relies upon
nAckReverse to determine when it is permitted to drive the data
bus.
Select (Xflag)
I
Indicates printer on line.
nAutoFd (HostAck)
O
Requests a byte of data from the peripheral when it is asserted.
This signal indicates whether the data lines contain ECP address
or data in the forward direction. When in forward direction, normal
data are transferred when nAutoFd (HostAck) is high and an 8-bit
command is transferred when it is low.
nFault (nPeriphRequest)
I
Generates an error interrupt when it is asserted. This signal is
valid only in the forward direction. The peripheral is permitted (but
not required) to drive this pin low to request a reverse transfer
during ECP Mode.
nInit (nReverseRequest)
O
This signal sets the transfer direction (asserted = reverse,
deasserted = forward). This pin is driven low to place the channel
in the reverse direction.
nSelectIn (ECPMode)
O
This signal is always deasserted in ECP mode.
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6.3.13 ECP Operation
The host must negotiate on the parallel port to determine if the peripheral supports the ECP protocol
before ECP operation. After negotiation, it is necessary to initialize some of the port bits. The following
are required:
(a) Set direction = 0, enabling the drivers.
(b) Set strobe = 0, causing the nStrobe signal to default to the deasserted state.
(c) Set autoFd = 0, causing the nAutoFd signal to default to the deasserted state.
(d) Set mode = 011 (ECP Mode)

ECP address/RLE bytes or data bytes may be sent automatically by writing the ecpAFifo or ecpDFifo,
respectively.
6.3.13.1 Mode Switching
Software will execute P1284 negotiation and all operation prior to a data transfer phase under
programmed I/O control (mode 000 or 001). Hardware provides an automatic control line handshake,
moving data between the FIFO and the ECP port only in the data transfer phase (mode 011 or 010).
If the port is in mode 000 or 001 it may switch to any other mode. If the port is not in mode 000 or 001 it
can only be switched into mode 000 or 001. The direction can be changed only in mode 001.
When in extended forward mode, the software should wait for the FIFO to be empty before switching
back to mode 000 or 001. In ECP reverse mode the software waits for all the data to be read from the
FIFO before changing back to mode 000 or 001.
6.3.13.2 Command/Data
ECP mode allows the transfer of normal 8-bit data or 8-bit commands. In the forward direction, normal
data are transferred when HostAck is high and an 8-bit command is transferred when HostAck is low.
The most significant bits of the command indicate whether it is a run-length count (for compression) or a
channel address.
In the reverse direction, normal data are transferred when PeriphAck is high and an 8-bit command is
transferred when PeriphAck is low. The most significant bit of the command is always zero.
6.3.13.3 Data Compression
The W83627HF supports run length encoded (RLE) decompression in hardware and can transfer
compressed data to a peripheral. Note that the odd (RLE) compression in hardware is not supported. In
order to transfer data in ECP mode, the compression count is written to the ecpAFifo and the data byte
is written to the ecpDFifo.
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6.3.14 FIFO Operation
The FIFO threshold is set in configuration register 5. All data transfers to or from the parallel port can
proceed in DMA or Programmed I/O (non-DMA) mode, as indicated by the selected mode. The FIFO is
used by selecting the Parallel Port FIFO mode or ECP Parallel Port Mode. After a reset, the FIFO is
disabled.
6.3.15 DMA Transfers
DMA transfers are always to or from the ecpDFifo, tFifo, or CFifo. The DMA uses the standard PC DMA
services. The ECP requests DMA transfers from the host by activating the PDRQ pin. The DMA will
empty or fill the FIFO using the appropriate direction and mode. When the terminal count in the DMA
controller is reached, an interrupt is generated and serviceIntr is asserted, which will disable the DMA.
6.3.16 Programmed I/O (NON-DMA) Mode
The ECP or parallel port FIFOs can also be operated using interrupt driven programmed I/O.
Programmed I/O transfers are to the ecpDFifo at 400H and ecpAFifo at 000H or from the ecpDFifo
located at 400H, or to/from the tFifo at 400H. The host must set the direction, state, dmaEn = 0 and
serviceIntr = 0 in the programmed I/O transfers.
The ECP requests programmed I/O transfers from the host by activating the IRQ pin. The programmed
I/O will empty or fill the FIFO using the appropriate direction and mode.
6.4 Extension FDD Mode (EXTFDD)
In this mode, the W83627HF changes the printer interface pins to FDC input/output pins, allowing the
user to install a second floppy disk drive (FDD B) through the DB-25 printer connector. The pin
assignments for the FDC input/output pins are shown in Table 6-1.
After the printer interface is set to EXTFDD mode, the following occur:
(1) Pins MOB# and DSB# will be forced to inactive state.
(2) Pins DSKCHG#, RDATA#, WP#, TRAK0#, INDEX# will be logically ORed with pins PD4-PD0 to
serve as input signals to the FDC.
(3) Pins PD4-PD0 each will have an internal resistor of about 1K ohm to serve as pull-up resistor for FDD
open drain/collector output.
(4) If the parallel port is set to EXTFDD mode after the system has booted DOS or another operating
system, a warm reset is needed to enable the system to recognize the extension floppy drive.
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6.5 Extension 2FDD Mode (EXT2FDD)
In this mode, the W83627HF changes the printer interface pins to FDC input/output pins, allowing the
user to install two external floppy disk drives through the DB-25 printer connector to replace internal
floppy disk drives A and B. The pin assignments for the FDC input/output pins are shown in Table6-1.
After the printer interface is set to EXTFDD mode, the following occur:
(1) Pins MOA#, DSA#, MOB#, and DSB# will be forced to inactive state.
(2) Pins DSKCHG#, RDATA#, WP#, TRAK0#, and INDEX# will be logically ORed with pins PD4-PD0 to
serve as input signals to the FDC.
(3) Pins PD4-PD0 each will have an internal resistor of about 1K ohm to serve as pull-up resistor for FDD
open drain/collector output.
(4) If the parallel port is set to EXT2FDD mode after the system has booted DOS or another operating
system, a warm reset is needed to enable the system to recognize the extension floppy drive.
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7. KEYBOARD CONTROLLER
The KBC (8042 with licensed KB BIOS) circuit of W83627HF is designed to provide the functions needed
to interface a CPU with a keyboard and/or a PS/2 mouse, and can be used with IBM
-
compatible
personal computers or PS/2-based systems. The controller receives serial data from the keyboard or
PS/2 mouse, checks the parity of the data, and presents the data to the system as a byte of data in its
output buffer. Then, The controller will asserts an interrupt to the system when data are placed in its
output buffer. The keyboard and PS/2 mouse are required to acknowledge all data transmissions. No
transmission should be sent to the keyboard or PS/2 mouse until an acknowledge is received for the
previous data byte.
8042
P24
P25
P21
P20
P27
P10
P26
T0
P23
T1
P22
P11
KIRQ
MIRQ
GATEA20
KBRST
P17
KINH
GP I/O PINS
P12~P16
KDAT
KCLK
MCLK
MDAT
Multiplex I/O PINS
Keyboard and Mouse Interface
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7.1 Output Buffer
The output buffer is an 8-bit read-only register at I/O address 60H (Default, PnP programmable I/O
address LD5-CR60 and LD5-CR61). The keyboard controller uses the output buffer to send the scan
code received from the keyboard and data bytes required by commands to the system. The output
buffer can only be read when the output buffer full bit in the register is "1".
7.2 Input Buffer
The input buffer is an 8-bit write-only register at I/O address 60H or 64H (Default, PnP programmable I/O
address LD5-CR60, LD5-CR61, LD5-CR62, and LD5-CR63). Writing to address 60H sets a flag to
indicate a data write; writing to address 64H sets a flag to indicate a command write. Data written to I/O
address 60H is sent to keyboard (unless the keyboard controller is expecting a data byte) through the
controller's input buffer only if the input buffer full bit in the status register is "0".
7.3 Status Register
The status register is an 8-bit read-only register at I/O address 64H (Default, PnP programmable I/O
address LD5-CR62 and LD5-CR63), that holds information about the status of the keyboard controller
and interface. It may be read at any time.
BIT
BIT FUNCTION
DESCRIPTION
0
Output Buffer Full
0: Output buffer empty
1: Output buffer full
1
Input Buffer Full
0: Input buffer empty
1: Input buffer full
2
System Flag
This bit may be set to 0 or 1 by writing to the system flag
bit in the command byte of the keyboard controller. It
defaults to 0 after a power-on reset.
3
Command/Data
0: Data byte
1: Command byte
4
Inhibit Switch
0: Keyboard is inhibited
1: Keyboard is not inhibited
5
Auxiliary Device Output
Buffer
0: Auxiliary device output buffer empty
1: Auxiliary device output buffer full
6
General Purpose Time-
out
0: No time-out error
1: Time-out error
7
Parity Error
0: Odd parity
1: Even parity (error)
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7.4 Commands
COMMAND
FUNCTION
20h
Read Command Byte of Keyboard Controller
60h
Write Command Byte of Keyboard Controller
BIT
1
2
3
4
5
6
7
0
BIT DEFINITION
Reserved
IBM Keyboard Translate Mode
Disable Auxiliary Device
Disable Keyboard
Reserve
System Flag
Enable Auxiliary Interrupt
Enable Keyboard Interrupt
A4h
Test Password
Returns 0Fah if Password is loaded
Returns 0F1h if Password is not loaded
A5h
Load Password
Load Password until a "0" is received from the system
A6h
Enable Password
Enable the checking of keystrokes for a match with the password
A7h
Disable Auxiliary Device Interface
A8h
Enable Auxiliary Device Interface
A9h
Interface Test
BIT
04
03
02
01
00
BIT DEFINITION
No Error Detected
Auxiliary Device "Clock" line is stuck low
Auxiliary Device "Clock" line is stuck high
Auxiliary Device "Data" line is stuck low
Auxiliary Device "Data" line is stuck low
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7.4 Commands, continued
COMMAND
FUNCTION
AAh
Self-test
Returns 055h if self test succeeds
ABh
Interface Test
BIT
04
03
02
01
00
BIT DEFINITION
No Error Detected
Keyboard "Clock" line is stuck low
Keyboard "Clock" line is stuck high
Keyboard "Data" line is stuck low
Keyboard "Data" line is stuck high
ADh
Disable Keyboard Interface
AEh
Enable Keyboard Interface
C0h
Read Input Port(P1) and send data to the system
C1h
Continuously puts the lower four bits of Port1 into STATUS register
C2h
Continuously puts the upper four bits of Port1 into STATUS register
D0h
Send Port2 value to the system
D1h
Only set/reset GateA20 line based on the system data bit 1
D2h
Send data back to the system as if it came from Keyboard
D3h
Send data back to the system as if it came from Auxiliary Device
D4h
Output next received byte of data from system to Auxiliary Device
E0h
Reports the status of the test inputs
FXh
Pulse only RC(the reset line) low for 6
S if Command byte is even
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7.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC
The KBC implements a hardware control logic to speed-up GATEA20 and KBRESET. This control logic
is controlled by LD5-CRF0 as follows:
7.5.1 KB Control Register (Logic Device 5, CR-F0)
BIT
7
6
5
4
3
2
1
0
NAME
KCLKS1 KCLKS0 Reserved Reserved Reserved
P92EN
HGA20 HKBRST
KCLKS1, KCLKS0
This 2 bits are for the KBC clock rate selection.
= 0 0
KBC clock input is 6 Mhz
= 0 1
KBC clock input is 8 Mhz
= 1 0
KBC clock input is 12 Mhz
= 1 1
KBC clock input is 16 Mhz
P92EN
(Port 92 Enable)
A "1" on this bit enables Port 92 to control GATEA20 and KBRESET.
A "0" on this bit disables Port 92 functions.
HGA20
(Hardware GATE A20)
A "1" on this bit selects hardware GATEA20 control logic to control GATE A20 signal.
A "0" on this bit disables hardware GATEA20 control logic function.
HKBRST
(Hardware Keyboard Reset)
A "1" on this bit selects hardware KB RESET control logic to control KBRESET signal.
A "0" on this bit disable hardware KB RESET control logic function.
When the KBC receives a data follows a "D1" command, the hardware control logic sets or clears GATE
A20 according to the received data bit 1. Similarly, the hardware control logic sets or clears KBRESET
depending on the received data bit 0. When the KBC receives a "FE" command, the KBRESET is pulse
low for 6
S(Min.) with 14
S(Min.) delay.
GATEA20 and KBRESET are controlled by either the software control or the hardware control logic and
they are mutually exclusive. Then, GATEA20 and KBRESET are merged along with Port92 when
P92EN bit is set.
7.5.2 Port 92 Control Register (Default Value = 0x24)
BIT
7
6
5
4
3
2
1
0
NAME
Res. (0) Res. (0)
Res. (1)
Res. (0)
Res. (0)
Res. (1)
SGA20 PLKBRST
SGA20
(Special GATE A20 Control)
A "1" on this bit drives GATE A20 signal to high.
A "0" on this bit drives GATE A20 signal to low.
PLKBRST
(Pull-Low KBRESET)
A "1" on this bit causes KBRESET to drive low for 6
S(Min.) with 14
S(Min.) delay. Before issuing
another keyboard reset command, the bit must be cleared.
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8. GENERAL PURPOSE I/O
W83627HF provides 24 input/output ports that can be individually configured to perform a simple basic
I/O function or a pre-defined alternate function. Those 24 GP I/O ports are divided into three groups,
each group contains 8 ports. The first group is configured through control registers in logical device 7,
the second group in logical device 8, and the third group in logical device 9. Users can configure each
individual port to be an input or output port by programming respective bit in selection register (CRF0: 0 =
output, 1 = input). Invert port value by setting inversion register (CRF2: 0 = non-inverse, 1 = inverse).
Port value is read/written through data register (CRF1). Table 8.1 and 8.2 gives more details on GPIO's
assignment. In addition, GPIO1 is designed to be functional even in power loss condition (VCC or VSB
is off). Figure 8.1 shows the GP I/O port's structure. Right after Power-on reset, those ports default to
perform basic input function except ports in GPIO1 which maintains its previous settings until a battery
loss condition.
Table 8.1
SELECTION BIT
0 = OUTPUT
1 = INPUT
INVERSION BIT
0 = NON INVERSE
1 = INVERSE
BASIC I/O OPERATIONS
0
0
Basic non-inverting output
0
1
Basic inverting output
1
0
Basic non-inverting input
1
1
Basic inverting input
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Table 8.2
GP I/O PORT DATA
REGISTER
REGISTER BIT
ASSIGNMENT
GP I/O PORT
BIT 0
GP10
BIT 1
GP11
BIT 2
GP12
BIT 3
GP13
GP1
BIT 4
GP14
BIT 5
GP15
BIT 6
GP16
BIT 7
GP17
BIT 0
GP20
BIT 1
GP21
GP2
BIT 2
GP22
BIT 3
GP23
BIT 4
GP24
BIT 5
GP25
BIT 6
GP26
BIT 7
GP27
BIT 0
GP30
BIT 1
GP31
BIT 2
GP32
BIT 3
GP33
GP3
BIT 4
GP34
BIT 5
GP35
BIT 6
GP36
BIT 7
GP37
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Figure 8.1
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9. PLUG AND PLAY CONFIGURATION
The W83627HF uses Compatible PNP protocol to access configuration registers for setting up different
types of configurations. In W83627HF, there are eleven Logical Devices (from Logical Device 0 to
Logical Device B with the exception of logical device 4 for backward compatibility) which correspond to
eleven individual functions: FDC (logical device 0), PRT (logical device 1), UART1 (logical device 2),
UART2 (logical device 3), KBC (logical device 5), CIR (Consumer IR, logical device 6), GPIO1 (logical
device 7), GPIO2 (logical device 8), GPIO3 (logical device 9), ACPI ((logical device A), and hardware
monitor (logical device B). Each Logical Device has its own configuration registers (above CR30). Host
can access those registers by writing an appropriate logical device number into logical device select
register at CR7.
9.1 Compatible PnP
9.1.1 Extended Function Registers
In Compatible PnP, there are two ways to enter Extended Function and read or write the configuration
registers. HEFRAS (CR26 bit 6) can be used to select one out of these two methods of entering the
Extended Function mode as follows:
HEFRAS
address and value
0
write 87h to the location 2Eh twice
1
write 87h to the location 4Eh twice
After Power-on reset, the value on RTSA# (pin 43) is latched by HEFRAS of CR26. In Compatible PnP,
a specific value (87h) must be written twice to the Extended Functions Enable Register (I/O port address
2Eh or 4Eh). Secondly, an index value (02h, 07h-FFh) must be written to the Extended Functions Index
Register (I/O port address 2Eh or 4Eh same as Extended Functions Enable Register) to identify which
configuration register is to be accessed. The designer can then access the desired configuration
register through the Extended Functions Data Register (I/O port address 2Fh or 4Fh).
After programming of the configuration register is finished, an additional value (AAh) should be written to
EFERs to exit the Extended Function mode to prevent unintentional access to those configuration
registers. The designer can also set bit 5 of CR26 (LOCKREG) to high to protect the configuration
registers against accidental accesses.
The configuration registers can be reset to their default or hardware settings only by a cold reset (pin MR
= 1). A warm reset will not affect the configuration registers.
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9.1.2 Extended Functions Enable Registers (EFERs)
After a power-on reset, the
W83627HF
enters the default operating mode. Before the
W83627HF
enters
the extended function mode, a specific value must be programmed into the Extended Function Enable
Register (EFER) so that the extended function register can be accessed. The Extended Function
Enable Registers are write-only registers. On a PC/AT system, their port addresses are 2Eh or 4Eh (as
described in previous section).
9.1.3 Extended Function Index Registers (EFIRs), Extended Function Data Registers(EFDRs)
After the extended function mode is entered, the Extended Function Index Register (EFIR) must be
loaded with an index value (02h, 07h-FEh) to access Configuration Register 0 (CR0), Configuration
Register 7 (CR07) to Configuration Register FE (CRFE), and so forth through the Extended Function
Data Register (EFDR). The EFIRs are write-only registers with port address 2Eh or 4Eh (as described in
section 12.2.1) on PC/AT systems; the EFDRs are read/write registers with port address 2Fh or 4Fh (as
described in section 9.2.1) on PC/AT systems.

9.2 Configuration Sequence
To program W83627HF configuration registers, the following configuration sequence must be followed:
(1). Enter the extended function mode
(2). Configure the configuration registers
(3). Exit the extended function mode
9.2.1 Enter the extended function mode
To place the chip into the extended function mode, two successive wrtites of 0x87 must be applied to
Extended Function Enable Registers(EFERs, i.e. 2Eh or 4Eh).
9.2.2 Configurate the configuration registers
The chip selects the logical device and activates the desired logical devices through Extended Function
Index Register(EFIR) and Extended Function Data Register(EFDR). EFIR is located at the same address
as EFER, and EFDR is located at address (EFIR+1).
First, write the Logical Device Number (i.e.,0x07) to the EFIR and then write the number of the desired
logical device to the EFDR. If accessing the Chip(Global) Control Registers, this step is not required.
Secondly, write the address of the desired configuration register within the logical device to the EFIR and
then write (or read) the desired configuration register through EFDR.
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9.2.3 Exit the extended function mode
To exit the extended function mode, one write of 0xAA to EFER is required. Once the chip exits the
extended function mode, it is in the normal running mode and is ready to enter the configuration mode.
9.2.4 Software programming example
The following example is written in Intel 8086 assembly language. It assumes that the EFER is located
at 2Eh, so EFIR is located at 2Eh and EFDR is located at 2Fh. If HEFRAS (CR26 bit 6) is set, 4Eh can
be directly replaced by 4Eh and 2Fh replaced by 4Fh.
;-----------------------------------------------------------------------------------
; Enter the extended function mode ,interruptible double-write |
;-----------------------------------------------------------------------------------
MOV DX,2EH
MOV AL,87H
OUT
DX,AL
OUT
DX,AL
;-----------------------------------------------------------------------------
; Configurate logical device 1, configuration register CRF0 |
;-----------------------------------------------------------------------------
MOV DX,2EH
MOV AL,07H
OUT
DX,AL
; point to Logical Device Number Reg.
MOV DX,2FH
MOV AL,01H
OUT
DX,AL
; select logical device 1
;
MOV DX,2EH
MOV AL,F0H
OUT
DX,AL
; select CRF0
MOV DX,2FH
MOV AL,3CH
OUT
DX,AL
; update CRF0 with value 3CH
;------------------------------------------
; Exit extended function mode |
;------------------------------------------
MOV DX,2EH
MOV AL,AAH
OUT
DX,AL
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W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 146 - Revision 1.0
13. CONFIGURATION REGISTER
13.1 Chip (Global) Control Register
CR02 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
: SWRST --> Soft Reset.
CR07
Bit 7 - 0 : LDNB7 - LDNB0 --> Logical Device Number Bit 7 - 0
CR20
Bit 7 - 0 : DEVIDB7 - DEBIDB0 --> Device ID Bit 7 - Bit 0 = 0x52 (read only).
CR21
Bit 7 - 0 : DEVREVB7 - DEBREVB0 --> Device Rev Bit 7 - Bit 0 = 0x1y (read only, y is version no).
CR22 (Default 0xff)
Bit 7
: Reserved.
Bit 6
: HMPWD
= 0 Power down
= 1 No Power down
Bit 5
: URBPWD
= 0 Power down
= 1 No Power down
Bit 4
: URAPWD
= 0 Power down
= 1 No Power down
Bit 3
: PRTPWD
= 0 Power down
= 1 No Power down
Bit 2, 1 : Reserved.
Bit 0
: FDCPWD
= 0 Power down
= 1 No Power down
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 147 - Revision 1.0
CR23 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
: IPD (Immediate Power Down). When set to 1, it will put the whole chip into power down
mode immediately.
CR24 (Default 0b1s000s0s)
Bit 7
: EN16SA
= 0 12 bit Address Qualification
= 1 16 bit Address Qualification
Bit 6
:CLKSEL
= 0 The clock input on Pin 1 should be 24 Mhz.
= 1 The clock input on Pin 1 should be 48 Mhz.
The corresponding power-on setting pin is SOUTB (pin 83).
Bit 5 - 3 : Reserved
Bit 2
: ENKBC
= 0 KBC is disabled after hardware reset.
= 1 KBC is enabled after hardware reset.
This bit is read only, and set/reset by power-on setting pin. The corresponding power-on
setting pin is SOUTA (pin 54).
Bit 1
: Reserved
Bit 0
: PNPCSV
= 0 The Compatible PnP address select registers have default values.
= 1 The Compatible PnP address select registers have no default value.
When trying to make a change to this bit, new value of PNPCVS must be complementary to the old
one to make an effective change. For example, the user must set PNPCVS to 0 first and then reset
it to 1 to reset these PnP registers if the present value of PNPCVS is 1. The corresponding power-
on setting pin is NDTRA (pin 52).
CR25 (Default 0x00)
Bit 7 - 6 : Reserved
Bit 5
: URBTRI
Bit 4
: URATRI
Bit 3
: PRTTRI
Bit 2 - 1 : Reserved
Bit 0
: FDCTRI.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 148 - Revision 1.0
CR26 (Default 0b0s000000)
Bit 7
: SEL4FDD
= 0 Select two FDD mode.
= 1 Select four FDD mode.
Bit 6
: HEFRAS
These two bits define how to enable Configuration mode. The corresponding power-on
setting pin is NRTSA (pin 51).
HEFRAS Address and Value
= 0 Write 87h to the location 2E twice.
= 1 Write 87h to the location 4Etwice.
Bit 5
: LOCKREG
= 0 Enable R/W Configuration Registers
= 1 Disable R/W Configuration Registers.
Bit 4
:Reserve
Bit 3
: DSFDLGRQ
= 0 Enable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is
effective on selecting IRQ
= 1 Disable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is not
effective on selecting IRQ
Bit 2
: DSPRLGRQ
= 0 Enable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is effective on
selecting IRQ
= 1 Disable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is not effective
on selecting IRQ
Bit 1
: DSUALGRQ
= 0 Enable UART A legacy mode IRQ selecting, then MCR bit 3 is effective on
selectingIRQ
= 1 Disable UART A legacy mode IRQ selecting, then MCR bit 3 is not effective on
selecting IRQ
Bit 0
: DSUBLGRQ
= 0 Enable UART B legacy mode IRQ selecting, then MCR bit 3 is effective on selecting
IRQ
= 1 Disable UART B legacy mode IRQ selecting, then MCR bit 3 is not effective on
selecting IRQ
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 149 - Revision 1.0
CR28 (Default 0x00)
Bit 7 - 3 : Reserved.
Bit 2 - 0 : PRTMODS2 - PRTMODS0
= 0xx Parallel Port Mode
= 100 Reserved
= 101 External FDC Mode
= 110 Reserved
= 111 External two FDC Mode
CR29 (GPIO3 multiplexed pin selection register. VBAT powered. Default 0x00)
Bit 7
: PIN64S
= 0 SUSLED (SUSLED control bits are in CRF3 of Logical Device 9)
= 1 GP35
Bit 6
: PIN69S
= 00 CIRRX#
= 01 GP34
Bit 5
: PIN70S
= 0 RSMRST#
= 1 GP33
Bit 4
: PIN71S
= 0 PWROK
= 1 GP32
Bit 3
: PIN72S
= 0 PWRCTL#
= 1 GP31
Bit 2
: PIN 73S
= 0 SLP_SX#
= 1 GP30
Bit 1
: Reserved
Bit 0
: Reserved
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 150 - Revision 1.0
CR2A (GPIO multiplexed pin selection register 1. VCC powered. Default 0X7C)
Bit 7
: Port Select (select Game Port or General Purpose I/O Port 1)
= 0 Game Port
= 1 General Purpose I/O Port 1 (pin121~128 select function GP10~GP17 or KBC Port 1)
Bit 6
: PIN128S
= 0 8042 P12
= 1 GP10
Bit 5
: PIN127S
= 0 8042 P13
= 1 GP11
Bit 4
: PIN126S
= 0 8042 P14
= 1 GP12
Bit 3
: PIN125S
= 0 8042 P15
= 1 GP13
Bit 2
: PIN124S
= 0 8042 P16
= 1 GP14
Bit 1
: PIN120S
= 0 MSO (MIDI Serial Output)
= 1 IRQIN0 (select IRQ resource through CRF4 Bit 7-4 of Logical Device 8)
Bit 1
: PIN119S
= 0 MS1 (MIDI Serial Input)
= 1 GP20
CR2B(GPIO multiplexed pin selection register 2. VCC powered. Default 0XC0)
Bit 7
:PIN92S
= 0 SCL
= 1 GP21
Bit 6
:PIN91S
= 0 SDA
= 1 GP22
Bit 5
: PIN90S
= 0 PLED (PLED0 control bits are in CRF5 of Logical Device 8)
= 1 GP23
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 151 - Revision 1.0

Bit 4
: PIN89S
= 0 WDTO (Watch Dog Timer is controlled by CRF5, CRF6, CRF7 of Logical Device 8)
= 1 GP24
Bit 3
: PIN88S
= 0 IRRX
= 1 GP25
Bit 2
: PIN87S
= 0 IRTX
= 1 GP26
Bit 1-0 :PIN 2S
= 00 DRVDEN1
= 01 IRQIN1 (select IRQ resource through CRF4 Bit 7-4 of Logical Device8) SMI# (For D
version only)
= 10 Reserved
= 11 GP27
CR2C (Default 0x00)
Reserved
CR2E (Default 0x00)
Test Modes: Reserved for Winbond.
CR2F (Default 0x00)
Test Modes: Reserved for Winbond.
13.2 Logical Device 0 (FDC)
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x03, 0xf0 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)
These two registers select FDC I/O base address [0x100:0xFF8] on 8 byte boundary.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 152 - Revision 1.0
CR70 (Default 0x06 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit 3 - 0 : These bits select IRQ resource for FDC.
CR74 (Default 0x02 if PNPCSV = 0 during POR, default 0x04 otherwise)
Bit 7 - 3 : Reserved.
Bit 2 - 0 : These bits select DRQ resource for FDC.
= 0x00 DMA0
= 0x01 DMA1
= 0x02 DMA2
= 0x03 DMA3
= 0x04 - 0x07 No DMA active
CRF0 (Default 0x0E)
FDD Mode Register
Bit 7
: FIPURDWN
This bit controls the internal pull-up resistors of the FDC input pins RDATA, INDEX, TRAK0,
DSKCHG, and WP.
= 0 The internal pull-up resistors of FDC are turned on.(Default)
= 1 The internal pull-up resistors of FDC are turned off.
Bit 6
: INTVERTZ
This bit determines the polarity of all FDD interface signals.
= 0 FDD interface signals are active low.
= 1 FDD interface signals are active high.
Bit 5
: DRV2EN (PS2 mode only)
When this bit is a logic 0, indicates a second drive is installed and is reflected in status register A.
Bit 4
: Swap Drive 0, 1 Mode
= 0 No Swap (Default)
= 1 Drive and Motor sel 0 and 1 are swapped.
Bit 3 - 2 :Interface Mode
= 11 AT Mode (Default)
= 10 (Reserved)
= 01 PS/2
= 00 Model 30
Bit 1
: FDC DMA Mode
= 0 Burst Mode is enabled
= 1 Non-Burst Mode (Default)
Bit 0
: Floppy Mode
= 0 Normal Floppy Mode (Default)
= 1 Enhanced 3-mode FDD
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 153 - Revision 1.0
CRF1 (Default 0x00)
Bit 7 - 6 : Boot Floppy
= 00 FDD A
= 01 FDD B
= 10 FDD C
= 11 FDD D
Bit 5, 4 : Media ID1, Media ID0. These bits will be reflected on FDC's Tape Drive Register bit 7, 6.
Bit 3 - 2 : Density Select
= 00 Normal (Default)
= 01 Normal
= 10 1 ( Forced to logic 1)
= 11 0 ( Forced to logic 0)
Bit 1
: DISFDDWR
= 0 Enable FDD write.
= 1 Disable FDD write(forces pins WE, WD stay high).
Bit 0
: SWWP
= 0 Normal, use WP to determine whether the FDD is write protected or not.
= 1 FDD is always write-protected.

CRF2 (Default 0xFF)
Bit 7 - 6 : FDD D Drive Type
Bit 5 - 4 : FDD C Drive Type
Bit 3 - 2 : FDD B Drive Type
Bit 1 - 0 : FDD A Drive Type
CRF4 (Default 0x00)
FDD0 Selection:
Bit 7
: Reserved.
Bit 6
: Precomp. Disable.
= 1 Disable FDC Precompensation.
= 0 Enable FDC Precompensation.
Bit 5
: Reserved.
Bit 4 - 3 : DRTS1, DRTS0: Data Rate Table select (Refer to TABLE A).
= 00 Select Regular drives and 2.88 format
= 01 3-mode drive
= 10 2 Meg Tape
= 11 Reserved
Bit 2
: Reserved.
Bit 1:0 : DTYPE0, DTYPE1: Drive Type select (Refer to TABLE B).
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 154 - Revision 1.0
CRF5 (Default 0x00)
FDD1 Selection: Same as FDD0 of CRF4.

TABLE A
Drive Rate Table
Select
Data Rate
Selected Data Rate
SELDEN
DRTS1
DRTS0
DRATE1
DRATE0
MFM
FM
1
1
1Meg
---
1
0
0
0
0
500K
250K
1
0
1
300K
150K
0
1
0
250K
125K
0
1
1
1Meg
---
1
0
1
0
0
500K
250K
1
0
1
500K
250K
0
1
0
250K
125K
0
1
1
1Meg
---
1
1
0
0
0
500K
250K
1
0
1
2Meg
---
0
1
0
250K
125K
0



TABLE B
DTYPE0
DTYPE1
DRVDEN0(pin 2)
DRVDEN1(pin 3)
DRIVE TYPE
0
0
SELDEN
DRATE0
4/2/1 MB 3.5""
2/1 MB 5.25"
2/1.6/1 MB 3.5" (3-MODE)
0
1
DRATE1
DRATE0
1
0
SELDEN
DRATE0
1
1
DRATE0
DRATE1
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 155 - Revision 1.0
13.3 Logical Device 1 (Parallel Port)
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x03, 0x78 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)
These two registers select Parallel Port I/O base address.
[0x100:0xFFC] on 4 byte boundary (EPP not supported) or
[0x100:0xFF8] on 8 byte boundary (all modes supported, EPP is only available when the base
address is on 8 byte boundary).

CR70 (Default 0x07 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for Parallel Port.

CR74 (Default 0x04)
Bit 7 - 3 : Reserved.
Bit 2 - 0 : These bits select DRQ resource for Parallel Port.
0x00=DMA0
0x01=DMA1
0x02=DMA2
0x03=DMA3
0x04 - 0x07= No DMA active

CRF0 (Default 0x3F)
Bit 7
: Reserved.
Bit 6 - 3 : ECP FIFO Threshold.
Bit 2 - 0 : Parallel Port Mode (CR28 PRTMODS2 = 0)
= 100 Printer Mode (Default)
= 000 Standard and Bi-direction (SPP) mode
= 001 EPP - 1.9 and SPP mode
= 101 EPP - 1.7 and SPP mode
= 010 ECP mode
= 011 ECP and EPP - 1.9 mode
= 111 ECP and EPP - 1.7 mode.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 156 - Revision 1.0
13.4 Logical Device 2 (UART A))
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x03, 0xF8 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)
These two registers select Serial Port 1 I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x04 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit 3 - 0 : These bits select IRQ resource for Serial Port 1.
CRF0 (Default 0x00)
Bit 7 - 2 : Reserved.
Bit 1 - 0 : SUACLKB1, SUACLKB0
= 00 UART A clock source is 1.8462 Mhz (24MHz/13)
= 01 UART A clock source is 2 Mhz (24MHz/12)
= 10 UART A clock source is 24 Mhz (24MHz/1)
= 11 UART A clock source is 14.769 Mhz (24mhz/1.625)
13.5 Logical Device 3 (UART B)
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x02, 0xF8 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)
These two registers select Serial Port 2 I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x03 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for Serial Port 2.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 157 - Revision 1.0
CRF0 (Default 0x00)
Bit 7 - 4 : Reserved.
Bit 3
: RXW4C
= 0 No reception delay when SIR is changed from TX mode to RX mode.
= 1 Reception delays 4 characters-time (40 bit-time) when SIR is changed from TX mode
to RX mode.
Bit 2
: TXW4C
= 0 No transmission delay when SIR is changed from RX mode to TX mode.
= 1 Transmission delays 4 characters-time (40 bit-time) when SIR is changed from RX
mode to TX mode.
Bit 1 - 0 : SUBCLKB1, SUBCLKB0
= 00 UART B clock source is 1.8462 Mhz (24MHz/13)
= 01 UART B clock source is 2 Mhz (24MHz/12)
= 10 UART B clock source is 24 Mhz (24MHz/1)
= 11 UART B clock source is 14.769 Mhz (24mhz/1.625)
CRF1 (Default 0x00)
Bit 7
: Reserved.
Bit 6
: IRLOCSEL. IR I/O pins' location select.
= 0 Through SINB/SOUTB.
= 1 Through IRRX/IRTX.
Bit 5
: IRMODE2. IR function mode selection bit 2.
Bit 4
: IRMODE1. IR function mode selection bit 1.
Bit 3
: IRMODE0. IR function mode selection bit 0.
IR MODE
IR FUNCTION
IRTX
IRRX
00X
Disable
tri-state
high
010*
IrDA
Active pulse 1.6
S
Demodulation into SINB/IRRX
011*
IrDA
Active pulse 3/16 bit time
Demodulation into SINB/IRRX
100
ASK-IR
Inverting IRTX/SOUTB pin
routed to SINB/IRRX
101
ASK-IR
Inverting IRTX/SOUTB & 500 KHZ
clock
routed to SINB/IRRX
110
ASK-IR
Inverting IRTX/SOUTB
Demodulation into SINB/IRRX
111*
ASK-IR
Inverting IRTX/SOUTB & 500 KHZ
clock
Demodulation into SINB/IRRX
Note: The notation is normal mode in the IR function.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 158 - Revision 1.0
Bit 2
: HDUPLX. IR half/full duplex function select.
= 0 The IR function is Full Duplex.
= 1 The IR function is Half Duplex.
Bit 1
: TX2INV
= 0 the SOUTB pin of UART B function or IRTX pin of IR function in normal condition.
= 1 inverse the SOUTB pin of UART B function or IRTX pin of IR function.
Bit 0
: RX2INV.
= 0 the SINB pin of UART B function or IRRX pin of IR function in normal condition.
= 1 inverse the SINB pin of UART B function or IRRX pin of IR function
13.6 Logical Device 5 (KBC)
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x00, 0x60 if PNPCSV = 0 during POR, default 0x00 otherwise)
These two registers select the first KBC I/O base address [0x100:0xFFF] on 1 byte boundary.
CR62, CR 63 (Default 0x00, 0x64 if PNPCSV = 0 during POR, default 0x00 otherwise)
These two registers select the second KBC I/O base address [0x100:0xFFF] on 1 byte boundary.

CR70 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for KINT (keyboard).

CR72 (Default 0x0C if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for MINT (PS2 Mouse)
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 159 - Revision 1.0
CRF0 (Default 0x80)
Bit 7 - 6 : KBC clock rate selection
= 00 Select 6MHz as KBC clock input.
= 01 Select 8MHz as KBC clock input.
= 10 Select 12Mhz as KBC clock input.
= 11 Select 16Mhz as KBC clock input.
(W83627HF/F-AW can support these 4 kinds of clock input, but W83627HF/F-PW only
support 12MHz clock input)
Bit 5 - 3 : Reserved.
Bit 2
= 0 Port 92 disable.
= 1 Port 92 enable.
Bit 1
= 0 Gate20 software control.
= 1 Gate20 hardware speed up.
Bit 0
= 0 KBRST software control.
= 1 KBRST hardware speed up.
13.7 Logical Device 6 (CIR)
CR30 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x00, 0x00)
These two registers select CIR I/O base address [0x100:0xFF8] on 8 byte boundary.

CR70 (Default 0x00)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for CIR.
13.8 Logical Device 7 (Game Port and MIDI Port and GPIO Port 1)
CR30 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activate Game Port and MIDI Port.
= 0 Game Port and MIDI Port is inactive.

CR60, CR 61 (Default 0x02, 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
These two registers select the Game Port base address [0x100:0xFFF] on 1 byte boundary.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 160 - Revision 1.0
CR62, CR 63 (Default 0x03, 0x30 if PNPCSV = 0 during POR, default 0x00 otherwise)
These two registers select the MIDI Port base address [0x100:0xFFF] on 2 byte boundary.
CR70 (Default 0x09 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for MIDI Port .
CRF0 (GP10-GP17 I/O selection register. Default 0xFF)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.
CRF1 (GP10-GP17 data register. Default 0x00)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
CRF2 (GP10-GP17 inversion register. Default 0x00)
When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.
13.9 Logical Device 8 (GPIO Port 2)
CR30 (GP20-GP27 Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activate GPIO2.
= 0 GPIO2 is inactive.
CRF0 (GP20-GP27 I/O selection register. Default 0xFF)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.

CRF1 (GP20-GP27 data register. Default 0x00)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
CRF2 (GP20-GP27 inversion register. Default 0x00)
When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 161 - Revision 1.0
CRF3 (Default 0x00)
Bit 7 - 4 : These bits select IRQ resource for IRQIN1.
Bit 3 - 0 : These bits select IRQ resource for IRQIN0.

CRF4 (Reserved)

CRF5 (PLED mode register. Default 0x00)
Bit 7-6 : select PLED mode
= 00 Power LED pin is tri-stated.
= 01 Power LED pin is drived low.
= 10 Power LED pin is a 1Hz toggle pulse with 50 duty cycle
= 11 Power LED pin is a 1/4Hz toggle pulse with 50 duty cycle.
Bit 5-4 : Reserved
Bit 3
: select WDTO count mode.
= 0 second
= 1 minute
Bit 2
: Enable the rising edge of keyboard Reset(P20) to force Time-out event.
= 0 Disable
= 1 Enable
Bit 1-0 : Reserved
CRF6 (Default 0x00)
Watch Dog Timer Time-out value. Writing a non-zero value to this register causes the counter to
load the value to Watch Dog Counter and start counting down. If the Bit 7 and Bit 6 are set, any
Mouse Interrupt or Keyboard Interrupt event will also cause the reload of previously-loaded non-zero
value to Watch Dog Counter and start counting down. Reading this register returns current value in
Watch Dog Counter instead of Watch Dog Timer Time-out value.

Bit 7 - 0 = 0x00 Time-out Disable
= 0x01 Time-out occurs after 1 second/minute
= 0x02 Time-out occurs after 2 second/minutes
= 0x03 Time-out occurs after 3 second/minutes
................................................
= 0xFF Time-out occurs after 255 second/minutes
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 162 - Revision 1.0
CRF7 (Default 0x00)
Bit 7
: Mouse interrupt reset Enable or Disable
= 1 Watch Dog Timer is reset upon a Mouse interrupt
= 0 Watch Dog Timer is not affected by Mouse interrupt
Bit 6
: Keyboard interrupt reset Enable or Disable
= 1 Watch Dog Timer is reset upon a Keyboard interrupt
= 0 Watch Dog Timer is not affected by Keyboard interrupt
Bit 5
: Force Watch Dog Timer Time-out, Write only*
= 1 Force Watch Dog Timer time-out event; this bit is self-clearing.
Bit 4
: Watch Dog Timer Status, R/W
= 1 Watch Dog Timer time-out occurred
= 0 Watch Dog Timer counting
Bit 3 -0 : These bits select IRQ resource for Watch Dog. Setting of 2 selects SMI.
13.10 Logical Device 9 (GPIO Port 3 This power of the Port is standby source (VSB) )
CR30 (Default 0x00)
Bit 7 - 1 : Reserved
Bit 0
= 1 Activate GPIO3.
= 0 GPIO3 is inactive.
CRF0 (GP30-GP35 I/O selection register. Default 0xFF Bit 7-6: Reserve)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.
CRF1 (GP30-GP35 data register. Default 0x00 Bit 7-6: Reserve)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
CRF2 (GP30-GP35 inversion register. Default 0x00 Bit 7-6: Reserve)
When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.
CRF3 (SUSLED mode register. Default 0x00)
Bit 7-6 : select Suspend LED mode
= 00 Suspend LED pin is drived low.
= 01 Suspend LED pin is tri-stated.
= 10 Suspend LED pin is a 1Hz toggle pulse with 50 duty cycle.
= 11 Suspend LED pin is a 1/4Hz toggle pulse with 50 duty cycle.
This mode selection bit 7-6 keep its settings until battery power loss.
Bit 5 - 0 : Reserved.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 163 - Revision 1.0
13.11 Logical Device A (ACPI)
CR30 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.
CR70 (Default 0x00)
Bit 7 - 4 : Reserved.
Bit 3 - 0 : These bits select IRQ resources for
PME
.

CRE0 (Default 0x00)
Bit 7
: DIS-PANSW_IN. Disable panel switch input to turn system power supply on.
= 0 PANSW_IN is wire-ANDed and connected to PANSW_OUT.
= 1 PANSW_IN is blocked and can not affect PANSW_OUT.
Bit 6
: ENKBWAKEUP. Enable Keyboard to wake-up system via PANSW_OUT.
= 0 Disable Keyboard wake-up function.
= 1 Enable Keyboard wake-up function.
Bit 5
: ENMSWAKEUP. Enable Mouse to wake-up system via PANSW_OUT.
= 0 Disable Mouse wake-up function.
= 1 Enable Mouse wake-up function.
Bit 4
: MSRKEY. Select Mouse Left/Right Botton to wake-up system via PANSW_OUT.
= 0 Select click on Mouse Left-botton twice to wake the system up.
= 1 Select click on Mouse right-botton twice to wake the system up.
Bit 3
: ENCIRWAKEUP. Enable CIR to wake-up system via PANSW_OUT.
= 0 Disable CIR wake-up function.
= 1 Enable CIR wake-up function.
Bit 2
: KB/MS Swap. Enable Keyboard/Mouse port-swap.
= 0 Keyboard/Mouse ports are not swapped.
= 1 Keyboard/Mouse ports are swapped.
Bit 1
: MSXKEY. Enable any character received from Mouse to wake-up the system.
= 0 Only click Mouse left/right-botton twice can wake the system up.
= 1 Only click Mouse left/right-botton once can wake the system up.
Bit 0
: KBXKEY. Enable any character received from Keyboard to wake-up the system
= 0 Only predetermined specific key combination can wake up the system.
= 1 Any character received from Keyboard can wake up the system.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 164 - Revision 1.0
CRE1 (Default 0x00) Keyboard Wake-Up Index Register
This register is used to indicate which Keyboard Wake-Up Shift register or Predetermined key Register
is to be read/written via CRE2. The range of Keyboard wake-up index register is 0x00 - 0x19, and the
range of CIR wake-up index register is 0x20 - 0x2F.
CRE2 Keyboard Wake-Up Data Register
This register holds the value of wake-up key register indicated by CRE1. This register can be
read/written.

CRE3 (Read only) Keyboard/Mouse Wake-Up Status Register
Bit 7-5 : Reserved.
Bit 4
: PWRLOSS_STS: This bit is set when power loss occurs.
Bit 3
: CIR_STS. The Panel switch event is caused by CIR wake-up event. This bit is cleared by
reading this register.
Bit 2
: PANSW_STS. The Panel switch event is caused by PANSW_IN. This bit is cleared by
reading this register.
Bit 1
: Mouse_STS. The Panel switch event is caused by Mouse wake-up event. This bit is
cleared by reading this register.
Bit 0
: Keyboard_STS. The Panel switch event is caused by Keyboard wake-up event. This bit
is cleared by reading this register.
CRE4 (Default 0x00)
Bit 7
: Power loss control bit 2.
0 = Disable ACPI resume
1 = Enable ACPI resume
Bit 6-5 : Power loss control bit <1:0>
00 = System always turn off when come back from power loss state.
01 = System always turn on when come back from power loss state.
10 = System turn on/off when come back from power loss state depend on the state
before power loss.
11 = Reserved.
Bit 4
: Suspend clock source select
0 = Use internal clock source.
1 = Use external suspend clock source(32.768KHz).
Bit 3
: Keyboard wake-up type select for wake-up the system from S1/S2.
0 = Password or Hot keys programmed in the registers.
1 =Any key.
Bit 2
: Enable all wake-up event set in CRE0 can wake-up the system from S1/S2 state. This bit
is cleared when wake-up event occurs.
0 = Disable.
1 = Enable.
Bit 1 - 0 : Reserved.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 165 - Revision 1.0
CRE5 (Default 0x00)
Bit 7
: Reserved.
Bit 6 - 0 : Compared Code Length. When the compared codes are storaged in the data register,
these data length should be written to this register.

CRE6 (Default 0x00)
Bit 7 - 6 : Reserved.
Bit 5 - 0 : CIR Baud Rate Divisor. The clock base of CIR is 32khz, so that the baud rate is 32khz
divided by ( CIR Baud Rate Divisor + 1).
CRE7 (Default 0x00)
Bit 7 - 3 : Reserved.
Bit 2
: Reset CIR Power-On function. After using CIR power-on, the software should write logical
1 to restart CIR power-on function.
Bit 1
: Invert RX Data.
= 1 Inverting RX Data.
= 0 Not inverting RX Data.
Bit 0
: Enable Demodulation.
= 1 Enable received signal to demodulate.
= 0 Disable received signal to demodulate.
CRF0 (Default 0x00)
Bit 7
: CHIPPME. Chip level auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.
Bit 6
: CIRPME. Consumer IR port auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.
Bit 5
: MIDIPME. MIDI port auto power management enable.
= 0 disable the auto power management functions
= 1 enable the auto power management functions.
Bit 4
: Reserved. Return zero when read.
Bit 3
: PRTPME. Printer port auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 166 - Revision 1.0

Bit 2
: FDCPME. FDC auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.
Bit 1
: URAPME. UART A auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.
Bit 0
: URBPME. UART B auto power management enable.
= 0 disable the auto power management functions.
= 1 enable the auto power management functions.
CRF1 (Default 0x00)
Bit 7
: WAK_STS. This bit is set when the chip is in the sleeping state and an enabled resume
event occurs. Upon setting this bit, the sleeping/working state machine will transition the
system to the working state. This bit is only set by hardware and is cleared by writing a 1
to this bit position or by the sleeping/working state machine automatically when the global
standby timer expires.
= 0 the chip is in the sleeping state.
= 1 the chip is in the working state.
Bit 6 - 5 : Devices' trap status.
Bit 4
: Reserved. Return zero when read.
Bit 3 - 0 : Devices' trap status.
CRF3 (Default 0x00)
Bit 7 - 6 : Reserved. Return zero when read.
Bit 5 - 0 : Device's IRQ status.
These bits indicate the IRQ status of the individual device respectively. The device's IRQ
status bit is set by their source device and is cleared by writing a 1. Writing a 0 has no
effect.
Bit 5
: MOUIRQSTS. MOUSE IRQ status.
Bit 4
: KBCIRQSTS. KBC IRQ status.
Bit 3
: PRTIRQSTS. printer port IRQ status.
Bit 2
: FDCIRQSTS. FDC IRQ status.
Bit 1
: URAIRQSTS. UART A IRQ status.
Bit 0
: URBIRQSTS. UART B IRQ status.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 167 - Revision 1.0
CRF4 (Default 0x00)
Bit 7 - 6 : Reserved. Return zero when read.
Bit 5 - 0 : These bits indicate the IRQ status of the individual GPIO function or logical device
respectively. The status bit is set by their source function or device and is cleared by
writing a1. Writing a 0 has no effect.
Bit 5
: HMIRQSTS. Hardware monitor IRQ status.
Bit 4
: WDTIRQSTS. Watch dog timer IRQ status.
Bit 3
: CIRIRQSTS. Consumer IR IRQ status.
Bit 1
: IRQIN1STS. IRQIN1 status.
Bit 0
: IRQIN0STS. IRQIN0 status.
CRF6 (Default 0x00)
Bit 7 - 6 : Reserved. Return zero when read.
Bit 5 - 0 : Enable bits of the SMI /
PME
generation due to the device's IRQ.
These bits enable the generation of an SMI /
PME
interrupt due to any IRQ of the devices.
SMI /
PME
logic output = (MOUIRQEN and MOUIRQSTS) or (KBCIRQEN and
KBCIRQSTS) or (PRTIRQEN and PRTIRQSTS) or (FDCIRQEN and FDCIRQSTS) or
(URAIRQEN and URAIRQSTS) or (URBIRQEN and URBIRQSTS) or
(HMIRQEN and HMIRQSTS) or (WDTIRQEN and WDTIRQSTS) or
(IRQIN3EN and IRQIN3STS) or (IRQIN2EN and IRQIN2STS) or
(IRQIN1EN and IRQIN1STS) or (IRQIN0EN and IRQIN0STS)
Bit 5
: MOUIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to MOUSE's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to MOUSE's IRQ.
Bit 4
: KBCIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to KBC's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to KBC's IRQ.
Bit 3
: PRTIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to printer port's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to printer port's IRQ.
Bit 2
: FDCIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to FDC's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to FDC's IRQ.
Bit 1
: URAIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to UART A's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to UART A's IRQ.
Bit 0
: URBIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to UART B's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to UART B's IRQ.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 168 - Revision 1.0
CRF7 (Default 0x00)
Bit 7 - 6 : Reserved. Return zero when read
Bit 5 - 0 : Enable bits of the SMI /
PME
generation due to the GPIO IRQ function or device's IRQ.
Bit 5
: HMIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to hardware monitor's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to hardware monitor's IRQ.
Bit 4
: WDTIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to watch dog timer's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to watch dog timer's IRQ.
Bit 3
: CIRIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to CIR's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to CIR's IRQ
Bit 2
: MIDIIRQEN.
= 0 disable the generation of an SMI /
PME
interrupt due to MIDI's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to MIDI's IRQ.
Bit 1
: IRQIN1EN.
= 0 disable the generation of an SMI /
PME
interrupt due to IRQIN1's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to IRQIN1's IRQ.
Bit 0
: IRQIN0EN.
= 0 disable the generation of an SMI /
PME
interrupt due to IRQIN0's IRQ.
= 1 enable the generation of an SMI /
PME
interrupt due to IRQIN0's IRQ.
CRF9 (Default 0x00)
Bit 7 - 3 : Reserved. Return zero when read.
Bit 2
: PME_EN: Select the power management events to be either an
PME
or SMI interrupt for
the IRQ events. Note that: this bit is valid only when SMIPME_OE = 1.
= 0 the power management events will generate an SMI event
= 1 the power management events will generate an
PME
event.
Bit 1
: FSLEEP: This bit selects the fast expiry time of individual devices.
= 0 1 second.
= 1 8 milli-seconds
Bit 0
: SMIPME_OE: This is the SMI and
PME
output enable bit.
= 0 neither SMI nor
PME
will be generated. Only the IRQ status bit is set.
= 1 an SMI or
PME
event will be generated.
CRFE, FF (Default 0x00)
Reserved for Winbond test.
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 169 - Revision 1.0
13.12 Logical Device B (Hardware Monitor)
CR30 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
= 1 Activates the logical device.
= 0 Logical device is inactive.

CR60, CR 61 (Default 0x00, 0x00)
These two registers select Hardware Monitor base address [0x100:0xFFF] on 8-byte boundary.
CR70 (Default 0x00)
Bit 7 - 4 : Reserved.
Bit 3 - 0 : These bits select IRQ resource for Hardware Monitor.

CRF0 (Default 0x00)
Bit 7 - 1 : Reserved.
Bit 0
: Disable initial abnormal beep (VcoreA and +3.3 V)
= 0 Enable power-on abnormal beep
= 1 Disable power-on abnormal beep




W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 170 -
Revision 1.0
14. SPECIFICATIONS
14.1 Absolute Maximum Ratings
PARAMETER
RATING
UNIT
Power Supply Voltage (5V)
-0.5 to 7.0
V
Input Voltage
-0.5 to V
DD
+0.5
V
RTC Battery Voltage V
BAT
2.2 to 4.0
V
Operating Temperature
0 to +70
C
Storage Temperature
-55 to +150
C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
14.2 DC CHARACTERISTICS
(Ta = 0
C to 70
C, V
DD
= 5V
10%, V
SS
= 0V)
PARAMETER
SYM. MIN.
TYP.
MAX.
UNIT
CONDITIONS
RTC Battery Quiescent
Current
I
BAT
2.4
uA
V
BAT
= 2.5 V
ACPI Stand-by Power
Supply Quiescent Current
I
BAT
2.0
mA
V
SB
= 5.0 V, All ACPI pins are
not connected.
I/O
8t
- TTL level bi-directional pin with source-sink capability of 8 mA
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Output Low Voltage
V
OL
0.4
V
I
OL
= 8 mA
Output High Voltage
V
OH
2.4
V
I
OH
= - 8 mA
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0V
I/O
12t
- TTL level bi-directional pin with source-sink capability of 12 mA
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
Output High Voltage
V
OH
2.4
V
I
OH
= -12 mA
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0V
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 171 -
Revision 1.0
14.2 DC CHARACTERISTICS, continued
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
I/O
12tp3
- 3.3 V TTL level bi-directional pin with source-sink capability of 12 mA
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
Output High Voltage
V
OH
2.4
V
I
OH
= -12 mA
Input High Leakage
I
LIH
+10
A
V
IN
= 3.3V
Input Low Leakage
I
LIL
-10
A
V
IN
= 0V
I/OD
12t
- TTL level bi-directional pin with sink capability of 12 mA and open-drain
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
Input High Leakage
I
LIH
+10
A
V
IN
= 3.3V
Input Low Leakage
I
LIL
-10
A
V
IN
= 0V
I/O
24t
- TTL level bi-directional pin with source-sink capability of 24 mA
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Output Low Voltage
V
OL
0.4
V
I
OL
= 24 mA
Output High Voltage
V
OH
2.4
V
I
OH
= -24 mA
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0V
OUT
12t
- TTL level output pin with source-sink capability of 12 mA
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
Output High Voltage
V
OH
2.4
V
I
OH
= -12 mA
OUT
12tp3
- 3.3 V TTL level output pin with source-sink capability of 12 mA
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
Output High Voltage
V
OH
2.4
V
I
OH
= -12 mA
OD
12
- Open-drain output pin with sink capability of 12 mA
Output Low Voltage
V
OL
0.4
V
I
OL
= 12 mA
OD
24
- Open-drain output pin with sink capability of 24 mA
Output Low Voltage
V
OL
0.4
V
I
OL
= 24 mA
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 172 -
Revision 1.0
14.2 DC CHARACTERISTICS, continued
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
IN
td
- TTL level input pin with internal pull down resistor
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0 V
pull down resistor
R
47
K
IN
t
- TTL level input pin
Input Low Voltage
V
IL
0.8
V
Input High Voltage
V
IH
2.0
V
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0 V
IN
cs
- CMOS level Schmitt-triggered input pin
Input Low Threshold Voltage
V
t-
1.3
1.5
1.7
V
V
DD
= 5 V
Input High Threshold Voltage
V
t+
3.2
3.5
3.8
V
V
DD
= 5 V
Hystersis
V
TH
1.5
2
V
V
DD
= 5 V
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0 V
IN
ts
- TTL level Schmitt-triggered input pin
Input Low Threshold Voltage
V
t-
0.5
0.8
1.1
V
V
DD
= 5 V
Input High Threshold Voltage
V
t+
1.6
2.0
2.4
V
V
DD
= 5 V
Hystersis
V
TH
0.5
1.2
V
V
DD
= 5 V
Input High Leakage
I
LIH
+10
A
V
IN
= V
DD
Input Low Leakage
I
LIL
-10
A
V
IN
= 0 V
IN
tsp3
- 3.3 V TTL level Schmitt-triggered input pin
Input Low Threshold Voltage
V
t-
0.5
0.8
1.1
V
V
DD
= 3.3 V
Input High Threshold Voltage
V
t+
1.6
2.0
2.4
V
V
DD
= 3.3 V
Hystersis
V
TH
0.5
1.2
V
V
DD
= 3.3 V
Input High Leakage
I
LIH
+10
A
V
IN
= 3.3 V
Input Low Leakage
I
LIL
-10
A
V
IN
= 0 V
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 173 -
Revision 1.0
15. APPLICATION CIRCUITS
15.1 Parallel Port Extension FDD
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
PRINTER PORT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
JP13
WE2/SLCT
WD2/PE
MOB2/BUSY
DSB2/ACK
PD7
PD6
PD5
DCH2/PD4
RDD2/PD3
STEP2/SLIN
WP2/PD2
DIR2/INIT
TRK02/PD1
HEAD2/ERR
IDX2/PD0
RWC2/AFD
STB
JP 13A
EXT FDC
DCH2
TRK02
RDD2
DIR2
WP2
MOB2
RWC2
DSB2
HEAD2
STEP2
WD2
WE2
IDX2
Parallel Port Extension FDD Mode Connection Diagram
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 174 -
Revision 1.0
15.2 Parallel Port Extension 2FDD
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
PRINTER PORT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
JP13
WE2/SLCT
WD2/PE
MOB2/BUSY
DSB2/ACK
PD5
DCH2/PD4
RDD2/PD3
STEP2/SLIN
WP2/PD2
DIR2/INIT
TRK02/PD1
HEAD2/ERR
IDX2/PD0
RWC2/AFD
STB
JP 13A
EXT FDC
DCH2
TRK02
RDD2
DIR2
WP2
MOB2
RWC2
DSB2
HEAD2
STEP2
WD2
WE2
IDX2
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
DSA2
MOA2
Parallel Port Extension 2FDD Connection Diagram
DSA2/PD7
MOA2/PD6
15.3
Four FDD Mode
G1
A1
B1
G2
A2
B2
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
DSA
MOA
DSA
DSB
MOA
MOB
W83977F
74LS139
7407(2)
MOD
MOC
MOB
DSC
DSD
DSB
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 175 -
Revision 1.0
16. ORDERING INSTRUCTION
PART NO.
KBC FIRMWARE
REMARKS
W83627HF-AW
AMIKEY-2
TM
W83627HF-PW
Phoenix MultiKey/42
TM
Only support 12MHz KBC
clock input
17.
HOW TO READ THE TOP MARKING
Example: The top marking of W83627HF-AW
inbond
W83627HF-AW
821A2B282012345
AM. MEGA. 87-96
1st line: Winbond logo
2nd line: the type number: W83627HF-AW
3rd line: the source of KBC F/W -- American Megatrends Incorporated
TM
4th line: the tracking code
821 A 2 C 282012345
821
: packages made in '98, week 21
A
: assembly house ID; A means ASE, S means SPIL.... etc.
2
: Winbond internal use.
B
: IC revision; A means version A, B means version B
282012345
: wafer production series lot number
W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 176 -
Revision 1.0
18. PACKAGE DIMENSIONS
(128-pin QFP)
L
L
1
Detail F
c
e
b
1
38
H
D
D
39
64
H
E
E
102
65
1.Dimension D & E do not include interlead
flash.
2.Dimension b does not include dambar
protrusion/intrusion
3.Controlling dimension : Millimeter
4.General appearance spec. should be based
on final visual inspection spec.
.
Note:
Seating Plane
See Detail F
y
A
A
1
A
2
128
103
5. PCB layout please use the "mm".
Symbol
b
c
D
e
H
D
H
E
L
y
0
A
A
L
1
1
2
E
7
0
0.08
1.60
0.95
17.40
0.80
17.20
0.65
17.00
14.10
0.20
0.30
2.87
14.00
2.72
0.50
13.90
0.10
0.10
2.57
0.25
Min
Nom
Max
Dimension in mm
0.20
0.15
19.90
20.00
20.10
23.00
23.20
23.40
0.35
0.45
0.003
0
0.063
0.037
0.685
0.031
0.677
0.025
0.669
0.020
0.555
0.008
0.012
0.113
0.551
0.107
0.547
0.004
0.004
0.101
0.010
Max
Nom
Min
Dimension in inch
0.006
0.008
7
0.783 0.787
0.791
0.905
0.913
0.921
0.014
0.018

Headquarters
No. 4, Creation Rd. III
Science-Based Industrial Park
Hsinchu, Taiwan
TEL: 886-35-770066
FAX: 886-35-789467
www: http://www.winbond.com.tw/
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502
TLX: 16485 WINTPE
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II
123 Hoi Bun Rd., Kwun Tong
Kowloon, Hong Kong
TEL: 852-27516023-7
FAX: 852-27552064
Winbond Electronics
(North America) Corp.
2730 Orchard Parkway
San Jose, CA 95134 U.S.A.
TEL: 1-408-9436666
FAX: 1-408-9436668
Note: All data and specifications are subject to change without notice.