W83783S Data Sheet Revision History

Pages

Dates

Version

Version
on Web

Main Contents

n.a.

All the version before 0.50 are for internal use.

n.a.

98/7

0.5

n.a.

First publication.

P.36

99/4

0.55

Add the content of Diode Selection Register Index
59h( Bank0)

P.38

99/4

0.55

Add the content of 7.25 Fan Divisor Register and
rename to VBAT Monitor Control Register Index
5Dh( Bank0)

Please note that all data and specifications are subject to change without notice. All
the trade marks of products and companies mentioned in this data sheet belong to
their respective owners.

LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or
systems where malfunction of these products can reasonably be expected to result
in personal injury. Winbond customers using or selling these products for use in
such applications do so at their own risk and agree to fully indemnify Winbond for
any damages resulting from such improper use or sales.

W83783S

Preliminary

Publication Release Date: April 1999

- I -

Version

0.55

TABLE OF CONTENTS

1. GENERAL DESCRIPTION .......................................................................................................................1

2. FEATURES .....................................................................................................Error! Bookmark not defined.

2.1 Monitoring Items ...................................................................................................................................2

2.2 Actions Enabling ...................................................................................................................................2

2.3 General ..................................................................................................................................................2

2.4 Package .................................................................................................................................................2

3. KEY SPECIFICATIONS............................................................................................................................3

4. PIN CONFIGURATION.............................................................................................................................3

5. PIN DESCRIPTION....................................................................................................................................4

6. FUNCTIONAL DESCRIPTION.................................................................................................................6

6.1 General Description ...............................................................................................................................6

6.2 Access Interface .....................................................................................................................................6

6.2.1 The first serial bus access timing are shown as follow: .....................................................................6
6.2.2 The serial bus timing of the temperature 2 and 3 is shown as follow:................................................7

6.3 Analog Inputs ......................................................................................................................................10

6.3.1 Monitor over 4.096V voltage:.........................................................................................................11
6.3.2 Monitor negative voltage: ..............................................................................................................12
6.3.3 Monitor temperature from thermistor:............................................................................................13
6.3.4 Monitor temperature from Pentium II

thermal diode or bipolar transistor 2N3904 .....................13

6.4 FAN Speed Count and FAN Speed Control ..........................................................................................14

6.4.1 Fan speed count .............................................................................................................................14
6.4.2 Fan speed control...........................................................................................................................15

6.5 Temperature Measurement Machine ....................................................................................................16

6.5.1 The W83783S temperature sensor 2 SMI# interrupt has two modes: ...............................................17
6.5.2 The W83783S temperature sensor 1 SMI# interrupt has three modes..............................................18
6.5.3 The W83783S temperature sensor 1 Over-Temperature (OVT#) has three modes............................19

6.6 Voltage and Fan SMI# mode :..............................................................................................................20

6.6.1 Voltage SMI# mode :......................................................................................................................20
6.6.2 Fan SMI# mode :............................................................................................................................20

W83783S

Preliminary

Publication Release Date: April 1999

- II -

Version

0.55

7. REGISTERS AND RAM ..........................................................................................................................22

7.1 Configuration Register

Index 40h....................................................................................................22

7.2 Interrupt Status Register 1

Index 41h ...............................................................................................23

7.3 Interrupt Status Register 2

Index 42h ..............................................................................................23

7.4 SMI# Mask Register 1

Index 43h ....................................................................................................24

7.5 SMI# Mask Register 2

Index 44h ....................................................................................................25

7.6 Reserved Register

Index 45h-- 46h..................................................................................................25

7.7 VID/Fan Divisor Register

Index 47h ...............................................................................................26

7.8 Serial Bus Address Register

Index 48h............................................................................................26

7.9 Value RAM

Index 20h- 3Fh or 60h - 7Fh........................................................................................27

7.10 Voltage ID (VID4) & Device ID - Index 49h......................................................................................29

7.11 Temperature 2 and Temperature 3 Serial Bus Address Register--Index 4Ah.......................................29

7.12 Pin Control Register - Index 4Bh .......................................................................................................30

7.13 IRQ#/OVT# Property Select - Index 4Ch ...........................................................................................31

7.14 FAN IN/OUT and BEEP/GPO# Control Register - Index 4Dh ...........................................................32

7.15 Register 50h ~ 5Fh Bank Select - Index 4Eh ......................................................................................33

7.16 Winbond Vendor ID - Index 4Fh........................................................................................................33

7.17 Winbond Test Register -- Index 50h - 55h (Bank 0) ..........................................................................34

7.18 BEEP Control Register 1-- Index 56h (

Bank 0) ..................................................................................34

7.19 BEEP Control Register 2-- Index 57h (

Bank 0) ..................................................................................35

7.20 Chip ID -- Index 58h (

Bank 0) ...........................................................................................................36

7.21 Diode Selection Register -- Index 59h (

Bank 0).................................................................................36

7.22 PWMOUT1 Control Register -- Index 5Ah (

Bank 0)......................................................................36-A

7.23 PWMOUT2 Control Register -- Index 5Bh (

Bank 0) ..........................................................................37

7.24 PWMOUT1/2 Clock Select Register -- Index 5Ch (

Bank 0)................................................................37

7.25 VBAT Monitor Control Register -- Index 5Dh (

Bank 0).....................................................................38

7.26 Reserved Register -- Index 5Eh (

Bank 0)............................................................................................39

7.27 Reserved Register -- Index 5Fh (

Bank 0) ...........................................................................................39

7.28 Temperature Sensor 1 Temperature (High Byte) Register - Index 00h ................................................39

7.29 Temperature Sensor 1 Temperature (Low Byte) Register - Index 00h .................................................39

7.30 Temperature Sensor 1 Configuration Register - Index 01h .................................................................40

7.31 Temperature Sensor 1 Hysteresis (High Byte) Register - Index 02h ....................................................41

W83783S

Preliminary

Publication Release Date: April 1999

- III -

Version

0.55

7.32 Temperature Sensor 1 Hysteresis (Low Byte) Register - Index 02h .....................................................41

7.33 Temperature Sensor 1 Over-temperature (High Byte) Register - Index 03h.........................................42

7.34 Temperature Sensor 1 Over-temperature (Low Byte) Register - Index 03h .........................................42
7.35 Reserved Register -- Index 50h--52h (BANK4) .................................................................................43

7.36 BEEP Control Register 3 -- Index 53h (

Bank 4) .................................................................................43

7.37 Reserved Register -- Index 54h--58h (

Bank 4)....................................................................................43

7.38 Real Time Hardware Status Register I -- Index 59h (

Bank 4) .............................................................43

7.39 Real Time Hardware Status Register II -- Index 5Ah (

Bank 4) ...........................................................44

8. SPECIFICATIONS ...................................................................................................................................46

8.1 Absolute Maximum Ratings.................................................................................................................46

8.2 DC Characteristics ...............................................................................................................................46

8.3 AC Characteristics ...............................................................................................................................48

8.3.1

Serial Bus Timing Diagram ...........................................................................................................48

9. HOW TO READ THE TOP MARKING .................................................................................................49

10. PACKAGE DIMENTIONS.....................................................................................................................50

11. APPLICATION CIRCUIT OF WINBOND W83783S...........................................................................52

W83783S

WINBOND H/W MONITORING IC

Publication Release Date: April 1999

- 1 - Revision 0.55

1. GENERAL DESCRIPTION

W83783S is an evolving version of W83782D --- Winbond's most popular hardware status
monitoring IC. The W83783S 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 stable and properly. W83783S provides I2C

serial bus

interface.

An 8-bit analog-to-digital converter (ADC) was built inside W83783S. The W83783S can monitor 6
analog voltage inputs, 3 fan tachometer inputs, and 3 remote temperature. The remote temperature
sensing can be performed by thermistors, or 2N3904 NPN-type transistors, or directly from Intel

Deschutes CPU thermal diode output. Also the W83783S provides: 2 PWM (pulse width modulation)
outputs for the fan speed control; beep tone output for warning; SMI#, OVT#, GPO# signals for
system protection events.

Through the application software or BIOS, the users can read all the monitored parameters of system
from time to time. And a pop-up warning can be also activated when the monitored item was out of
the proper/preset range. The application software could be Winbond's Hardware Doctor

, or Intel

LDCM (LanDesk Client Management), or other management application software. Also the users can
set up the upper and lower limits (alarm thresholds) of these monitored parameters and to activate
one programmable and maskable interrupts. An optional beep tone could be used as warning signal
when the monitored parameters is out of the preset range.

Additionally, 5 VID inputs are provided to read the VID of CPU (i.e. Pentium

II) if applicable. This is

to provide the Vcore voltage correction automatically. Also W83783S uniquely provides an optional
feature: early stage (before BIOS was loaded) beep warning. This is to detect if the fatal elements
present --- Vcore or +3.3V voltage fail, and the system can not be boomed up.

W83783S

Preliminary

Publication Release Date: April 1999

- 2 - Revision 0.55

2. FEATURES

2.1 Monitoring Items

�

3 thermal inputs from remote thermistors or 2N3904 NPN-type transistors or Pentium

(Deschutes) thermal diode output

�

6 voltage inputs

�

--- typical for Vcore, +3.3V, +12V, -12V, +5V, -5V

�

3 fan speed monitoring inputs

�

Case open detection input

�

WATCHDOG comparison of all monitored values

�

Programmable hysteresis and setting points (alarm thresholds) for all monitored items

2.2 Actions Enabling

�

Beep tone warning

�

2 PWM (pulse width modulation) outputs for fan speed control (MUX optional)

--- Total up to 2 sets of fan speed monitoring and controlling

�

Issue SMI#, OVT#, GPO# signals to activate system protection

�

Warning signal pop-up in application software

2.3 General

�

serial bus interface

�

5 VID input pins for CUP Vcore identification (for Pentium

II)

�

Initial power fault beep (for +3.3V, Vcore)

�

Intel

LDCM (DMI driver 2.0) support

�

Acer

ADM (DMI driver 2.0) support

�

Winbond hardware monitoring application software (Hardware Doctor

) support, for both

Windows 95/98 and Windows NT 4.0/5.0

�

Input clock rate optional for 24, 48, 14.318 Mhz

�

5V Vcc operation

2.4 Package

�

24-pin SOP

W83783S

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- 4 - Revision 0.55

5. PIN DESCRIPTION

I/O

12t

- TTL level bi-directional pin with 12 mA source-sink capability

I/O

12ts

- TTL level and schmitt trigger

OUT

- Output pin with 12 mA source-sink capability

AOUT - Output pin(Analog)

- Open-drain output pin with 12 mA sink capability

- TTL level input pin

- TTL level input pin and schmitt trigger

AIN

- Input pin(Analog)

Pin Name

Pin No.

Type

Description

VID4

Voltage Supply readouts from Pentium II

FANIN1

t s

0V to 5V amplitude fan tachometer input.

FANIN2

t s

0V to 5V amplitude fan tachometer input.

FANIN3/
PWMOUT1

t s

OUT

12t

0V to 5V amplitude fan tachometer input. /

Fan speed control (PWM) output.

This multi-functional pin is programmable.

OVT#

Over temperature Shutdown Output.

BEEP/GPO#

Beep (Default) / General purpose output

This multi-functional pin is programmable.

VID3

Voltage Supply readouts from Pentium II

CLKIN

System clock input. Can select 48MHz or 24MHz
or 14.318MHz. The default is 24MHz.

SMI# /

PWMOUT2

OUT

12t

System Management Interrupt (open drain). The
default state is disabled.

Fan speed control (PWM) output.

This multi-functional pin is programmable.

GNDD

DGROUND

Internally connected to all digital circuitry.

SCL

t s

Serial Bus Clock.

SDA

Serial Bus bi-directional Data.

VID2

Voltage Supply readouts from Pentium II

W83783S

Preliminary

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- 5 - Revision 0.55

Pin Discription, continued

Pin Name

Pin No.

Type

Description

VID1

Voltage Supply readouts from Pentium II

VID0

Voltage Supply readouts from Pentium II

GNDA

AGROUND

Internally connected to all analog circuitry. The
ground reference for all analog inputs.

-5VIN /

VT2 /

PII2

AIN

0V to 4.096V FSR Analog Inputs (Default). /

Thermistor 2 terminal input. /

Pentium II

thermal 2 diode input.

This multi-functional pin is programmable.

-12VIN

AIN

0V to 4.096V FSR Analog Inputs.

+12VIN

AIN

0V to 4.096V FSR Analog Inputs.

+3.3VIN

AIN

0V to 4.096V FSR Analog Inputs.

VCOREA

AIN

0V to 4.096V FSR Analog Inputs.

VREF

AOUT

Reference Voltage.

VT1 /

PII1

AIN

Thermistor 1 terminal input. /

Pentium II

thermal diode 1 input.

(+5V)

POWER

+5V V

power. Bypass with the parallel

combination of 10

�

F (electrolytic or tantalum) and

0.1

�

F (ceramic) bypass capacitors.

W83783S

Preliminary

Publication Release Date: April 1999

- 6 - Revision 0.55

6. FUNCTIONAL DESCRIPTION

6.1 General Description

The W83783S provides at most 6 analog positive inputs, 3 fan speed monitors, 2 sets for fan PWM
(Pulse Width Modulation) control, 2 thermal inputs from remote thermistors or 2N3904 transistors or
Pentium

II (Deschutes) thermal diode outputs and beep function output when the monitor value

exceed the set limit value including voltage, temperature, or fan counter. When start the monitor
function on the chip, the watch dog machine monitor every function and store the value to registers. If
the monitor value exceeds the limit value, the interrupt status will be set to 1.

6.2 Access Interface

The W83783S provides I

C Serial Bus to read/write internal reigsters. In the W83783S there are two

serial bus address. The first address defined at CR[48h] can read/write all registers excluding Bank 1
temperature sensor registers and the address default value is 0101101. The second address defined
at CR[4Ah] bit2-0 only read/write temperature sensor 1 registers and the address default value is
1001001.

6.2.1 The first serial bus access timing are shown as follow:

(a) Serial bus write to internal address register followed by the data byte

Start By
Master

Ack

781D

R/W

Ack

781D

SCL

SDA

Ack

781D

Stop

Master

SCL

SDA (Continued)

Frame 2

Internal Index Register Byte

(Continued)

Frame 3

Data Byte

Frame 1

Serial Bus Address Byte

Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte

W83783S

Preliminary

Publication Release Date: April 1999

- 7 - Revision 0.55

(b) Serial bus write to internal address register only

Start By
Master

Ack

781D

R/W

Ack

781D

SCL

SDA

Frame 2

Internal Index Register Byte

Frame 1

Serial Bus Address Byte

Figure 2. Serial Bus Write to Internal Address Register Only

Stop by

Master

(c) Serial bus read from a register with the internal address register prefer to desired location

Start By
Master

Ack

Master

R/W

Ack

781D

SCL

SDA

Frame 2

Internal Index Register Byte

Frame 1

Serial Bus Address Byte

Figure 3. Serial Bus Write to Internal Address Register Only

Stop by

Master

6.2.2 The serial bus timing of the temperature 2 and 3 is shown as follow:

(a) Typical 2-byte read from preset pointer location (Temp, T

, T

HYST

)

Start By

Master

Ack

Master

R/W

Ack

782D

SCL

SDA

Frame 2

MSB Data Byte

Frame 1

Serial Bus Address Byte

Figure 4. Typical 2-Byte Read From Preset Pointer Location

Stop by
Master

...

Ack

Master

...

Frame 3

LSB Data Byte

W83783S

Preliminary

Publication Release Date: April 1999

- 8 - Revision 0.55

(b) Typical pointer set followed by immediate read for 2-byte register (Temp, T

, T

HYST

)

Start By

Master

Ack

Master

Ack

782D

SCL

SDA

Frame 4

MSB Data Byte

Frame 3

Serial Bus Address Byte

Figure 5. Typical Pointer Set Followed by Immediate Read for 2-Byte Register

Stop by
Master

...

No Ack

Master

...

Frame 5

LSB Data Byte

Start By

Master

R/W

Ack

782D

SCL

SDA

Frame 1

Serial Bus Address Byte

Ack

782D

Frame 2

Pointer Byte

R/W

(c) Typical read 1-byte from configuration register with preset pointer

Start By

Master

Ack

782D

SCL

SDA

Frame 2

Data Byte

Frame 1

Serial Bus Address Byte

Figure 6. Typical 1-Byte Read From Configuration With Preset Pointer

Stop by

Master

No Ack

Master

R/W

W83783S

Preliminary

Publication Release Date: April 1999

- 9 - Revision 0.55

(d) Typical pointer set followed by immediate read from configuration register

Repea

Start

Master

Ack

782D

SCL (Cont..)

SDA (Cont..)

Frame 4

MSB Data Byte

Frame 3

Serial Bus Address Byte

Figure 7. Typical Pointor Set Followed by Immediate Read from Temp 2/3
Configuration Register

Stop by
Master

No Ack

Master

Start By

Master

R/W

Ack

782D

SCL

SDA

Frame 1

Serial Bus Address Byte

Ack

782D

Frame 2

Pointer Byte

R/W

...

(e) Temperature 2/3 configuration register Write

Ack

782D

SCL (Cont...)

SDA (Cont...)

Frame 3

Configuration Data Byte

Figure 8. Configuration Register Write

Start By

Master

R/W

Ack

782D

SCL

SDA

Frame 1

Serial Bus Address Byte

Ack

782D

Frame 2

Pointer Byte

Stop

Master

W83783S

Preliminary

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- 10 - Revision 0.55

(f) Temperature 2/3 T

and T

HYST

write

Ack

781D

SCL (Cont...)

SDA (Cont...)

Frame 3

MSB Data Byte

Figure 9. Configuration Register Write

Start By

Master

R/W

Ack

782D

SCL

SDA

Frame 1

Serial Bus Address Byte

Ack

782D

Frame 2

Pointer Byte

Ack

782D

Stop

Master

Frame 4

LSB Data Byte

6.3 Analog Inputs

The maximum input voltage of the analog pin is 4.096V because the 8-bit ADC has a 16mv LSB.
Really, the application of the PC monitoring would most often be connected to power suppliers. The
CPU V-core voltage ,+3.3V and battery voltage can directly connected to these analog inputs. The
5VSB and +12V inputs should be reduced a factor with external resistors so as to obtain the input
range. As Figure 11 shows.

W83783S

Preliminary

Publication Release Date: April 1999

- 11 - Revision 0.55

VCORE

Pin 21

+3.3VIN

12VIN

Pin 20

Pin 19

Pin 24

VDD(+5V)

N12VIN

Pin 18

N5VIN

Positive Input

Negative Input

8-bit ADC

with

16mV LSB

Typical Thermister Connection

10K, 1%

THM

VREF

Pin 22

VT1

Pin 23

Pin 17

Positive Inputs

10K, 25 C

**The connections of VT2

is same as VT1

Figure 11.

6.3.1 Monitor over 4.096V voltage:

The input voltage +12VIN can be expressed as following equation.

VIN

�

The value of R1 and R2 can be selected to 28K Ohms and 10K Ohms, respectively, when the input
voltage V1 is 12V. The node voltage of +12VIN can be subject to less than 4.096V for the maximun
input range of the 8-bit ADC. The Pin 24 is connected to the power supply VCC with +5V. There are
two functions in this pin with 5V. The first function is to supply internal analog power in the W83783S
and the second function is that this voltage with 5V is connected to internal serial resistors to monitor
the +5V voltage. The value of two serial resistors are 34K ohms and 50K ohms so that input voltage
to ADC is 2.98V which is less than 4.096V of ADC maximum input voltage. The express equation can
represent as follows.

VCC

�

2 98

where VCC is set to 5V.

W83783S

Preliminary

Publication Release Date: April 1999

- 12 - Revision 0.55

6.3.2 Monitor negative voltage:

The negative voltage should be connected two series resistors and a positive voltage VREF (is equal
to 3.6V). In the Figure 11, the voltage V3 and V4 are two negative voltage which they are -12V and -
5V respectively. The voltage V3 is connected to two serial resistors then is connected to another
terminal VREF which is positive voltage. So as that the voltage node N12VIN can be obtain a
posedge voltage if the scales of the two serial resirtors are carefully selected. It is recommanded from
Winbond that the scale of two serial resistors are R5=232K ohms and R6=56K ohm. the The input
voltage of node -12VIN can be calculated by following equation.

VIN

VREF

232

�

(

)

(

)

where VREF is equal 3.6V.

If the V

is equal to -12V then the voltage is equal to 0.567V and the converted hexdecimal data is set

to 35h by the 8-bit ADC with 16mV-LSB.This monitored value should be converted to the real
negative votage and the express equation is shown as follows.

VIN

VREF

�

Where

is 232K/(232K+56K). If the N2VIN is 0.567 then the V5 is approximately equal to -12V.

The another negative voltage input V6 (approximate -5V) also can be evaluated by the similar
method and the serial resistors can be selected with R7=120K ohms and R8=56K ohms by the
Winbond recommended. The expression equation of V6 With -5V voltage is shown as follows.

N VIN

VREF

�

Where the

is set to 120K/(120K+56K). If the monitored ADC value in the N5VIN channel is 0.8635,

VREF=3.6V and the parameter

is 0.6818 then the negative voltage of V6 can be evalated to be -

5V.

W83783S

Preliminary

Publication Release Date: April 1999

- 13 - Revision 0.55

6.3.3 Monitor temperature from thermistor:

The W83783S can connect three thermistors to measure three different envirment temperature. The
specification of thermistor should be considered to (1)

value is 3435K, (2) resistor value is 10K

ohms at 25

�

C. In the Figure 11, the themistor is connected by a serial resistor with 10K Ohms, then

connect to VREF (Pin 37).

6.3.4 Monitor temperature from Pentium II

thermal diode or bipolar transistor 2N3904

The W83783S can alternate the thermistor to Pentium II

(Deschutes) thermal diode interface or

transistor 2N3904 and the circuit connection is shown as Figure 12. The pin of Pentium II

D- is

connected to power supply ground (GND) and the pin D+ is connected to pin PIIx in the W83783S.
The resistor R=30K ohms should be connected to VREF to supply the diode bias current and the
bypass capacitor C=3300pF should be added to filter the high frequency noise. The transistor 2N3904
should be connected to a form with a diode, that is, the Base (B) and Collector (C) in the 2N3904
should be tied togeter to act as a thermal diode.

2N3904

R=30K, 1%

C=3300pF

Bipolar Transistor

Temperature Sensor

Pentium II

CPU

D+

D-

Therminal

Diode

C=3300pF

R=30K, 1%

VREF

PIITDx

W83783S

Figure 12.

W83783S

Preliminary

Publication Release Date: April 1999

- 14 - Revision 0.55

6.4 FAN Speed Count and FAN Speed Control

6.4.1 Fan speed count

Inputs are provides for signals from fans equipped with tachometer outputs. The level of these signals
should be set to TTL level, and maximum input voltage can not be over +5.5V. If the input signals
from the tachometer outputs are over the VCC, the external trimming circuit should be added to
reduce the voltage to obtain the input specification. The normal circuit and trimming circuits are
shown as Figure 13.

Determine the fan counter according to:

Count

RPM Divisor

�

1 35 10

In other words, the fan speed counter has been read from register CR28 or CR29 or CR2A, the fan
speed can be evaluated by the following equation.

RPM

Count

Divisor

�

1 35

The default divisor is 2 and defined at CR47.bit7~4, CR4B.bit7~6, and Bank0 CR5D.bit5~7 which are
three bits for divisor. That provides very low speed fan counter such as power supply fan. The
followed table is an example for the relation of divisor, PRM, and count.

Divisor

Nominal

PRM

Time per

Revolution

Counts

70% RPM

Time for 70%

8800

6.82 ms

153

6160

9.74 ms

2 (default)

4400

13.64 ms

153

3080

19.48 ms

2200

27.27 ms

153

1540

38.96 ms

1100

54.54 ms

153

770

77.92 ms

550

109.08 ms

153

385

155.84 ms

275

218.16 ms

153

192

311.68 ms

137

436.32 ms

153

623.36 ms

128

872.64 ms

153

1246.72 ms

Table 1.

W83783S

Preliminary

Publication Release Date: April 1999

- 15 - Revision 0.55

FAN

Connector

FAN Out

+12V

GND

Pull-up resister

4.7K Ohms

+5V

+12V

Fan Input

Pin 18/19/20

W83783S

FAN

Connector

FAN Out

+12V

GND

Pull-up resister

4.7K Ohms

+12V

Fan Input

Pin 18/19/20

W83783S

14K~39K

10K

Figure 13-2. Fan with Tach Pull-Up to +12V, or Totem-Pole

Output and Register Attenuator

Figure 13-1. Fan with Tach Pull-Up to +5V

FAN

Connector

FAN Out

+12V

GND

Pull-up resister

> 1K

+12V

Fan Input

Pin 18/19/20

W83783S

FAN

Connector

FAN Out

+12V

GND

Pull-up resister < 1K
or totem-pole output

+12V

Fan Input

Pin 18/19/20

W83783S

> 1K

Figure 13-4. Fan with Tach Pull-Up to +12V, or
Totem-Pole Putput and Zener Clamp

Figure 13-3. Fan with Tach Pull-Up to +12V
and Zener Clamp

3.9V Zener

diode

6.4.2 Fan speed control

The W83783S provides four sets for fan PWM speed control. The duty cycle of PWM can be
programmed by a 8-bit registers which are defined in the Bank0 CR5A and CR5B. The default duty
cycle is set to 100%, that is, the default 8-bit registers is set to FFh. The expression of duty can be
represented as follows.

Duty

cycle

P r o g r a m m e d 8 - bit Register Value

255

�

(% )

100%

The PWM clock frequency also can be program and defined in the Bank0.CR5C . The application
circuit is shown as follows.

W83783S

Preliminary

Publication Release Date: April 1999

- 16 - Revision 0.55

+12V

FAN

NMOS

PNP Transistor

PWM Clock Input

Figure 14.

6.5 Temperature Measurement Machine

The temperature data format is 8-bit two

-complement for sensor 2 and 9-bit two -complement for

sensor 1. The 8-bit temperature data can be obtained by reading the CR[27h]. The 9-bit temperature
data can be obtained by reading the 8 MSBs from the Bank1 CR[50h] and the LSB from the Bank1
CR[51h] bit 7. The format of the temperature data is show in Table 1.

Temperature

8-Bit Digital Output

9-Bit Digital Output

8-Bit Binary

8-Bit Hex

9-Bit Binary

9-Bit Hex

+125

�

0111,1101

7Dh

0,1111,1010

0FAh

+25

�

0001,1001

19h

0,0011,0010

032h

�

0000,0001

01h

0,0000,0010

002h

+0.5

�

0,0000,0001

001h

�

0000,0000

00h

0,0000,0000

000h

-0.5

�

1,1111,1111

1FFh

-1

�

1111,1111

FFh

1,1111,1110

1FFh

-25

�

1110,0111

E7h

1,1100,1110

1CEh

-55

�

1100,1001

C9h

1,1001,0010

192h

Table 2.

W83783S

Preliminary

Publication Release Date: April 1999

- 17 - Revision 0.55

6.5.1 The W83783S temperature sensor 2 SMI# interrupt has two modes:

(1) Comparator Interrupt Mode

Setting the T

HYST

(Temperature Hysteresis) limit to 127

�

C will set temperature sensor 1 SMI# to

the Comparator Interrupt Mode. Temperature exceeds T

(Over Temperature) Limit causes an

interrupt and this interrupt will be reset by reading all the Interrupt Status Register. Once an
interrupt event has occurred by exceeding T

, then reset, if the temperature remains above the

, the interrupt will occur again when the next conversion has completed. If an interrupt event

has occurred by exceeding T

and not reset, the interrupts will not occur again. The interrupts

will continue to occur in this manner until the temperature goes below T

. (Figure 15-1 )

(2) Two-Times Interrupt Mode

Setting the T

HYST

lower than T

will set temperature sensor 1 SMI# to the Two-Times Interrupt

Mode. Temperature exceeding T

causes an interrupt and then temperature going below T

HYST

will also cause an interrupt if the previous interrupt has been reset by reading all the interrupt
Status Register. Once an interrupt event has occurred by exceeding T

, then reset, if the

temperature remains above the T

HYST

, the interrupt will not occur. (Figure 15-2 )

HYST

Figure 15-1. Comparator Interrupt Mode

*Interrupt Reset when Interrupt Status Registers are read

HYST

Figure 15-2. Two-Times Interrupt Mode

SMI#

127'C

W83783S

Preliminary

Publication Release Date: April 1999

- 18 - Revision 0.55

6.5.2 The W83783S temperature sensor 1 SMI# interrupt has three modes

(1) Comparator Interrupt Mode

Temperature exceeding T

causes an interrupt and this interrupt will be reset by reading all the

Interrupt Status Register. Once an interrupt event has occurred by exceeding T

, then reset, if

the temperature remains above the T

HYST

, the interrupt will occur again when the next conversion

has completed. If an interrupt event has occurred by exceeding T

and not reset, the interrupts

will not occur again. The interrupts will continue to occur in this manner until the temperature
goes below T

HYST

. ( Figure 16-1 )

(2) Two-Times Interrupt Mode

Temperature exceeding T

causes an interrupt and then temperature going below T

HYST

will also

cause an interrupt if the previous interrupt has been reset by reading all the interrupt Status
Register. Once an interrupt event has occurred by exceeding T

, then reset, if the temperature

remains above the T

HYST

, the interrupt will not occur. (Figure 16-2 )

(3) One-Time Interrupt Mode

Temperature exceeding T

causes an interrupt and then temperature going below T

HYST

will not

cause an interrupt. Once an interrupt event has occurred by exceeding T

, then going below

HYST,

an interrupt will not occur again until the temperature exceeding T

. (Figure 16-3 )

HYST

Figure 16-1. Comparator Interrupt Mode

*Interrupt Reset when Interrupt Status Registers are read

HYST

Figure 16-2. Two-Times Interrupt Mode

SMI#

W83783S

Preliminary

Publication Release Date: April 1999

- 19 - Revision 0.55

*Interrupt Reset when Interrupt Status Registers are read

HYST

Figure 16-3. One-Time Interrupt Mode

SMI#

6.5.3 The W83783S temperature sensor 1 Over-Temperature (OVT#) has three modes

(1) Comparator Mode :

Setting Bank1 CR[52h] bit 2 to 0 will set OVT# signal to comparator mode. Temperature
exceeding T

causes the OVT# output activated until the temperature is less than T

HYST

. (

Figure 17)

(2) Interrupt Mode:

Setting Bank1 CR[52h] bit 2 to 1 will set OVT# signal to interrupt mode. Setting Temperature
exceeding T

causes the OVT# output activated indefinitely until reset by reading temperature

sensor 2 or sensor 3 registers. Temperature exceeding T

, then OVT# reset, and then

temperature going below T

HYST

will also cause the OVT# activated indefinitely until reset by

reading temperature sensor2 or sensor 3 registers. Once the OVT# is activated by exceeding T

, then reset, if the temperature remains above T

HYST

, the OVT# will not be activated again.(

Figure 17)

W83783S

Preliminary

Publication Release Date: April 1999

- 22 - Revision 0.55

7. REGISTERS AND RAM

7.1 Configuration Register

Index 40h

40h

Power on Default Value

00000001 binary

Attribute:

Read/write

Size:

8 bits

7 6 5 4 3 2 1 0

START
SMI#Enable
RESERVED
INT_Clear
RESERVED
RESERVED
BEEP/GPO#
INITIALIZATION

Bit 7: A one restores power on default value to all registers except the Serial Bus Address register.

This bit clears itself since the power on default is zero.

Bit 6:

The logical 1 in this bit drives a zero on BEEP/GPO# pin.

Bit 5:

Reserved

Bit 4:

Reserved

Bit 3: A one disables the SMI# output without affecting the contents of Interrupt Status

Registers.

The device will stop monitoring. It will resume upon clearing of this bit.

Bit 2:

Reserved

Bit 1: A one enables the SMI# Interrupt output.

Bit 0: A one enables startup of monitoring operations, a zero puts the part in standby mode.

Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this location after an
interrupt has occurred unlike "INT_Clear'' bit.

W83783S

Preliminary

Publication Release Date: April 1999

- 23 - Revision 0.55

7.2 Interrupt Status Register 1

Index 41h

41h

Power on Default Value

00h

Attribute:

Read Only

Size:

8 bits

7 6 5 4 3 2 1 0

VCORE
Reserved
+3.3VIN
+5VIN
TEMP2
TEMP1
FAN1
FAN2

Bit 7: A one indicates the fan count limit of FAN2 has been exceeded.

Bit 6: A one indicates the fan count limit of FAN1 has been exceeded.

Bit 5: A one indicates a High limit of VT1 has been exceeded from temperature sensor.

Bit 4: A one indicates a High limit of VT2 has been exceeded from temperature sensor .

Bit 3: A one indicates a High or Low limit of +5VIN has been exceeded.

Bit 2: A one indicates a High or Low limit of +3.3VIN has been exceeded.

Bit 1: Reserved.

Bit 0: A one indicates a High or Low limit of VCORE has been exceeded.

7.3 Interrupt Status Register 2

Index 42h

42h

Power on Default Value

00h

Attribute:

Read Only

Size:

8 bits

W83783S

Preliminary

Publication Release Date: April 1999

- 27 - Revision 0.55

7.9 Value RAM

Index 20h- 3Fh or 60h - 7Fh

Index

Description

20h or 60h

VCORE reading

21h or 61h

Reserved

22h or 62h

+3.3VIN reading

23h or 63h

+5VIN reading

24h or 64h

+12VIN reading

25h or 65h

-12VIN reading

26h or 66h

-5VIN reading

27h or 67h

Temperature sensor 2 (VT2) reading

28h or 68h

FAN1 reading

Note: This location stores the number of counts of the internal clock
per revolution.

29h or 69h

FAN2 reading

Note: This location stores the number of counts of the internal clock
per revolution.

2Ah or 6Ah

FAN3 reading

Note: This location stores the number of counts of the internal clock
per revolution.

2Bh or 6Bh

VCORE High Limit, default value is defined by Vcore Voltage +0.2v.

2Ch or 6Ch

VCORE Low Limit, default value is defined by Vcore Voltage -0.2v.

2Dh or 6Dh

Reserved

2Eh or 6Eh

Reserved

2Fh or 6Fh

+3.3VIN High Limit

30h or 70h

+3.3VIN Low Limit

31h or 71h

+5VIN High Limit

32h or 72h

+5VIN Low Limit

W83783S

Preliminary

Publication Release Date: April 1999

- 28 - Revision 0.55

7.12

Value RAM

Index 20h- 3Fh or 60h - 7Fh, continued

Address A6-A0

Description

33h or 73h

+12VIN High Limit

34h or 74h

+12VIN Low Limit

35h or 75h

-12VIN High Limit

36h or 76h

-12VIN Low Limit

37h or 77h

-5VIN High Limit

38h or 78h

-5VIN Low Limit

39h or 79h

Temperature sensor 2 (VT2) High Limit

3Ah or 7Ah

Temperature sensor 2 (VT2) Hysteresis Limit

3Bh or 7Bh

FAN1 Fan Count Limit

Note: It is the number of counts of the internal clock for the Low Limit
of the fan speed.

3Ch or 7Ch

FAN2 Fan Count Limit

Note: It is the number of counts of the internal clock for the Low Limit
of the fan speed.

3Dh or 7Dh

FAN3 Fan Count Limit

Note: It is the number of counts of the internal clock for the Low Limit
of the fan speed.

3E- 3Fh or 7E-7Fh

Reserved

Setting all ones to the high limits for voltages and fans (0111 1111 binary for temperature) means
interrupts will never be generated except the case when voltages go below the low limits.

W83783S

Preliminary

Publication Release Date: April 1999

- 30 - Revision 0.55

Bit 7-4 : Reserved

Bit 3: Set to 1, disable temperature Sensor 1 and can not access any data from Temperature Sensor 1.

Bit 2-0: Temperature 2 Serial Bus Address. The serial bus address is 1001xxx. Where xxx are defined in

these bits.

7.12 Pin Control Register - Index 4Bh

4Bh

Power on Default Value

<7:0> 44h. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

Reserved
Reserved
CLKINSEL
CLKINSEL
ADCOVSEL
ADCOVSEL
FAN3DIV_B0
FAN3DIV_B1

Bit 7-6:Fan3 speed divisor.

Please refer to Bank0 CR[5Dh] , Fan divisor table.

Bit 5-4: Select A/D Converter Clock Input.

<5:4> = 00 - default. ADC clock select 22.5 Khz.

<5:4> = 01- ADC clock select 5.6 Khz. (22.5K/4)

<5:4> = 10 - ADC clock select 1.4Khz. (22.5K/16)

<5:4> = 11 - ADC clock select 0.35 Khz. (22.5K/64)

W83783S

Preliminary

Publication Release Date: April 1999

- 31 - Revision 0.55

Bit 3-2: Clock Input Select.

<3:2> = 00 - Pin 3 (CLKIN) select 14.318M Hz clock.

<3:2> = 01 - Default. Pin 3 (CLKIN) select 24M Hz clock.

<3:2> = 10 - Pin 3 (CLKIN) select 48M Hz clock .

<3:2> = 11 - Reserved. Pin3 no clock input.

Bit 1-0: Reserved.

User defined.

7.13 IRQ#/OVT# Property Select - Index 4Ch

4Ch

Power on Default Value

<7:0> --0000,0001. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

Reserved
Reserved
OVTPOL
DIS_OVT
Reserved
EN_ONE_INTMODE
T1_INTMode
PWM2SEL

Bit 7: Set to 1 , select pin 9 SMI#/PWMOUT2 as PWM output. Set to 0, select pin 9 as SMI# output.

Bit6: Set to 1, the SMI# output type of temperature sensor 1 is set to Comparator Interrupt mode. Set

to 0, the SMI# output type is set to Interrupt mode (defined by CR[4Ch] Bit 5 ).

Bit 5: Set to 1, the SMI# output type of temperature sensor 1 is set to One-Time interrupt mode. Set

to 0, the SMI# output type of temperature sensor 1 is set to Two-Times interrupt mode.

Bit 4 : Reserved. User Defined.

Bit 3: Disable temperature sensor 1 over-temperature (OVT) output if set to 1. Default 0, enable

OVT1 output through pin OVT#.

Bit 2: Over-temperature polarity. Write 1, OVT# active high. Write 0, OVT# active low. Default 0.

Bit 1-0: Reserved. User Defined.

W83783S

Preliminary

Publication Release Date: April 1999

- 32 - Revision 0.55

7.14 FAN IN/OUT and BEEP/GPO# Control Register - Index 4Dh

4Dh

Power on Default Value

<7:0> 0001,0101. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

FANINC1
FANOPV1
FANINC2
FANOPV2
FANINC3
FANOPV3
GPOSEL
DIS_ABN

Bit 7: Disable power-on abnormal the monitor voltage including V-Core A and +3.3V. If these voltage

exceed the limit value, the pin (Open Drain) of BEEP will drives 300Hz and 600Hz frequency
signal. Write 1, the frequency will be disable. Default 0. After power on, the system should set
1 to this bit to 1 in order to disable BEEP.

Bit 6: BEEP/GPO# Pin Function Select. Write 1 Select GPO# function. Set 0, select BEEP function.

This bit default 0.

Bit 5: FAN 3 output value if FANINC3 sets to 0. Write 1, then pin 4 always generate logic high

signal. Write 0, pin 4 always generates logic low signal. This bit default 0.

Bit 4: FAN 3 Input Control. Set to 1, pin 4 acts as FAN clock input, which is default value. Set to 0,

this pin 4 acts as FAN control signal and the output value of FAN control is set by this register
bit 5. This output pin can connect to power PMOS gate to control FAN ON/OFF.

Bit 3: FAN 2 output value if FANINC2 sets to 0. Write 1, then pin 3 always generate logic high

signal. Write 0, pin 3 always generates logic low signal. This bit default 0.

Bit 2: FAN 2 Input Control. Set to 1, pin 3 acts as FAN clock input, which is default value. Set to 0,

this pin 3 acts as FAN control signal and the output value of FAN control is set by this register
bit 3. This output pin can connect to power NMOS gate to control FAN ON/OFF.

Bit 1: FAN 1 output value if FANINC1 sets to 0. Write 1, then pin 2 always generate logic high

signal. Write 0, pin 2 always generates logic low signal. This bit default 0.

Bit 0: FAN 1 Input Control. Set to 1, pin 2 acts as FAN clock input, which is default value. Set to 0,

this pin 2 acts as FAN control signal and the output value of FAN control is set by this register
bit 1. This output pin can connect to power PMOS gate to control FAN ON/OFF.

W83783S

Preliminary

Publication Release Date: April 1999

- 33 - Revision 0.55

7.15 Register 50h ~ 5Fh Bank Select - Index 4Eh

4Eh

Power on Default Value

<6:3> = Reserved, <7> = 1, <2:0> = 0. Reset by MR

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

BANKSEL0
BANKSEL1
BANKSEL2
Reserved
Reserved
Reserved
Reserved
HBACS

Bit 7: HBACS- High byte access. Set to 1, access Register 4Fh high byte register.

Set to 0, access Register 4Fh low byte register. Default 1.

Bit 6-3: Reserved. This bit should be set to 0.

Bit 2-0: Index ports 0x50~0x5F Bank select.

7.16 Winbond Vendor ID - Index 4Fh

4Fh

Power on Default Value

<15:0> = 5CA3h

Attribute:

Read Only

Size:

16 bits

15 8 7 0

VIDH

VIDL

Bit 15-8: Vendor ID High Byte if CR4E.bit7=1.Default 5Ch.

Bit 7-0: Vendor ID Low Byte if CR4E.bit7=0. Default A3h.

W83783S

Preliminary

Publication Release Date: April 1999

- 34 - Revision 0.55

7.17 Winbond Test Register -- Index 50h - 55h (Bank 0)

7.18 BEEP Control Register 1-- Index 56h (Bank 0)

56h

Power on Default Value

<7:0> 0000,0000. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

EN_VC_BP
Reserved
EN_V33_BP
EN_V5_BP
EN_T2_BP
EN_T1_BP
EN_FAN1_BP
EN_FAN2_BP

Bit 7: Enable BEEP Output from FAN 2 if the monitor value exceed the limit value. Write 1, enable

BEEP output, which is default value.

Bit 6: Enable BEEP Output from FAN 1 if the monitor value exceed the limit value. Write 1, enable

BEEP output, which is default value.

Bit 5: Enable BEEP Output from Temperature Sensor 1 if the monitor value exceed the limit value.

Write 1, enable BEEP output. Default 0

Bit 4: Enable BEEP output for Temperature Sensor 2 if the monitor value exceed the limit value.

Write 1, enable BEEP output. Default 0

Bit 3: Enable BEEP output from VDD (+5V), Write 1, enable BEEP output if the monitor value exceed

the limits value. Default 0, that is disable BEEP output.

Bit 2: Enable BEEP output from +3.3V. Write 1, enable BEEP output, which is default value.

Bit 1: Reserved.

Bit 0: Enable BEEP Output from VCORE if the monitor value exceed the limits value. Write 1,

enable BEEP output, which is default value

W83783S

Preliminary

Publication Release Date: April 1999

- 35 - Revision 0.55

7.19 BEEP Control Register 2-- Index 57h (Bank 0)

57h

Power on Default Value <7:0> 1000-0000. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

EN_V12_BP
EN_NV12_BP
EN_NV5_BP
EN_FAN3_BP
Reserved
Reserved
Reserved
EN_GBP

Bit 7: Enable Global BEEP. Write 1, enable global BEEP output. Default 1. Write 0, disable all BEEP

output.

Bit 6-4: Reserved.

Bit 3: Enable BEEP Output from FAN 3 if the monitor value exceed the limit value. Write 1, enable

BEEP output. Default 0.

Bit 2: Enable BEEP output from -5V, Write 1, enable BEEP output if the monitor value exceed the

limits value. Default 0, that is disable BEEP output.

Bit 1: Enable BEEP output from -12V, Write 1, enable BEEP output if the monitor value exceed the

limits value. Default 0, that is disable BEEP output.

Bit 0: Enable BEEP output from +12V, Write 1, enable BEEP output if the monitor value exceed the

limits value. Default 0, that is disable BEEP output.

W83783S

Preliminary

Publication Release Date: April 1999

- 36 - Revision 0.55

7.20 Chip ID -- Index 58h (Bank 0)

58h

Power on Default Value

<7:0> 0100-0000. Reset by MR.

Attribute:

Read Only

Size:

8 bits

7 6 5 4 3 2 1 0

CHIPID

Bit 7: Winbond Chip ID number. Read this register will return 40h.

7.21 Diode Selection Register -- Index 59h (Bank 0)

59h

Power on Default Value

<7>=0 and <6:4> = 111 and <3:0> = 0000

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

Reserved
Reserved
Reserved
Reserved
SELPIIV2
SELPIIV1
Reserved
Reserved

Bit 7-6:

Reserved

Bit 5:

Temperature sensor diode 1. Set to 1, select Pentium II compatible Diode. Set to 0 to select 2N3904

Bipolar mode.

Bit 4:

Temperature sensor diode 2. Set to 1, select Pentium II compatible Diode. Set to 0 to select 2N3904

Bipolar mode.

Bit 3-0: Reserved

W83783S

Preliminary

Publication Release Date: April 1999

- 38 - Revision 0.55

Bit 3: Set to 1. Enable PWMOUT1 PWM Control
Bit 2-0: PWMOUT2 clock Selection.

<2:0> = 000: 46.87K Hz

<2:0> = 001: 23.43K Hz (Default)

<2:0> = 010: 11.72K Hz

<2:0> = 011: 5.85K Hz

<2:0> = 100: 2.93K Hz

7.25 VBAT Monitor Control Register -- Index 5Dh (Bank 0)

5Dh

Power on Default Value

<7:0> 0000-0000. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

Reserved
DIODES2
DIODES1
Reserved
Reserved
FANDIV1_B2
FANDIV2_B2
FANDIV3_B2

Bit 7: Fan3 divisor Bit 2.

Bit 6: Fan2 divisor Bit 2.

Bit 5: Fan1 divisor Bit 2.

Bit 4: Reserved

Bit 3: Reserved

Bit 2: Temperature sensor 1 select into thermal diode such as Pentium II CPU supported. Set to 1,

select bipolar sensor. Set to 0, select thermistor sensor.

Bit 1: Temperature Sensor 2 type selection. Defined as DIODES1 described in the bit 2.

Bit 0: Reserved

Fan divisor table :

Bit 2

Bit 1

Bit 0

Fan
Divisor

Bit 2

Bit 1

Bit 0

Fan Divisor

128

W83783S

Preliminary

Publication Release Date: April 1999

- 43 - Revision 0.55

7.35

Reserved Register -- Index 50h--52h (BANK4)

7.36 BEEP Control Register 3 -- Index 53h (Bank 4)

53h

Power on Default Value

<7:0> 0000,0000. Reset by MR.

Attribute:

Read/Write

Size:

8 bits

7 6 5 4 3 2 1 0

Reserved
Reserved
Reserved
Reserved
Reserved
EN_USER_BP
Reserved
Reserved

Bit 7-6: Reserved.

Bit 5: User define BEEP output function. Write 1, the BEEP is always active. Write 0, this function is

inactive. (Default 0)

Bit 4-0: Reserved.

7.37 Reserved Register -- Index 54h--58h (Bank 4)

7.38 Real Time Hardware Status Register I -- Index 59h (Bank 4)

59h

Power on Default Value

<7:0> 0000,0000. Reset by MR.

Attribute:

Read Only

Size:

8 bits

7 6 5 4 3 2 1 0

VCORE_STS
Reserved
+3.3VIN_STS
+5VIN_STS
TEMP2_STS
TEMP1_STS
FAN1_STS
FAN2_STS

W83783S

Preliminary

Publication Release Date: April 1999

- 44 - Revision 0.55

Bit 7: FAN 2 Status. Set 1, the fan speed counter is over the limit value. Set 0, the fan speed counter

is in the limit range.

Bit 6: FAN 1 Status. Set 1, the fan speed counter is over the limit value. Set 0, the fan speed counter

is in the limit range.

Bit 5: Temperature sensor 1 Status. Set 1, the voltage of temperature sensor is over the limit value.

Set 0, the voltage of temperature sensor is in the limit range.

Bit 4: Temperature sensor 2 Status. Set 1, the voltage of temperature sensor is over the limit value.

Set 0, the voltage of temperature sensor is in the limit range.

Bit 3: +5V Voltage Status. Set 1, the voltage of +5V is over the limit value. Set 0, the voltage of +5V

is in the limit range.

Bit 2: +3.3V Voltage Status. Set 1, the voltage of +3.3V is over the limit value. Set 0, the voltage of

+3.3V is in the limit range.

Bit 1: Reserved.

Bit 0: VCORE Voltage Status. Set 1, the voltage of VCORE is over the limit value. Set 0, the

voltage of VCORE is in the limit range.

7.39 Real Time Hardware Status Register II -- Index 5Ah (Bank 4)

5Ah

Power on Default Value

<7:0> 0000,0000. Reset by MR.

Attribute:

Read Only

Size:

8 bits

7 6 5 4 3 2 1 0

+12VIN_STS
-12VIN_STS
-5VIN_STS
FAN3_STS
Reserved
Reserved
Reserved
Reserved

W83783S

Preliminary

Publication Release Date: April 1999

- 46 - Revision 0.55

8. SPECIFICATIONS

8.1 Absolute Maximum Ratings

PARAMETER

RATING

UNIT

Power Supply Voltage

-0.5 to 7.0

Input Voltage

-0.5 to V

+0.5

Operating Temperature

0 to +70

�

Storage Temperature

-55 to +150

�

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.

8.2 DC Characteristics

(Ta = 0

�

C to 70

�

C, V

= 5V

�

10%, V

= 0V)

PARAMETER

SYM. MIN.

TYP.

MAX.

UNIT

CONDITIONS

I/O

12t

- TTL level bi-directional pin with source-sink capability of 12 mA

Input Low Voltage

0.8

Input High Voltage

2.0

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= - 12 mA

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0V

I/O

12ts

- TTL level bi-directional pin with source-sink capability of 12 mA and schmitt-trigger level

input

Input Low Threshold Voltage

0.5

0.8

1.1

= 5 V

Input High Threshold Voltage

1.6

2.0

2.4

= 5 V

Hysteresis

0.5

1.2

= 5 V

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= - 12 mA

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0V

W83783S

Preliminary

Publication Release Date: April 1999

- 47 - Revision 0.55

8.2 DC Characteristics, continued

PARAMETER

SYM.

MIN.

TYP.

MAX.

UNIT

CONDITIONS

OUT

12t

- TTL level output pin with source-sink capability of 12 mA

Output Low Voltage

0.4

= 12 mA

Output High Voltage

2.4

= -12 mA

- Open-drain output pin with sink capability of 8 mA

Output Low Voltage

0.4

= 8 mA

- Open-drain output pin with sink capability of 12 mA

Output Low Voltage

0.4

= 12 mA

- Open-drain output pin with sink capability of 48 mA

Output Low Voltage

0.4

= 48 mA

- TTL level input pin

Input Low Voltage

0.8

Input High Voltage

2.0

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

- TTL level Schmitt-triggered input pin

Input Low Threshold Voltage

0.5

0.8

1.1

= 5 V

Input High Threshold Voltage

1.6

2.0

2.4

= 5 V

Hysteresis

0.5

1.2

= 5 V

Input High Leakage

LIH

+10

�

= V

Input Low Leakage

LIL

-10

�

= 0 V

W83783S

Preliminary

Publication Release Date: April 1999

- 50 - Revision 0.55

10. PACKAGE DIMENTIONS

(24-pin SOP)

Control demensions are in milmeters .

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

Please note that all data and specifications are subject to change without notice. All the

trademarks of products and companies mentioned in this data sheet belong to their

respective owners

These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal
injury. Winbond customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Winbond for any damages resulting
from such improper use or sale.

11. APPLICATION CIRCUIT OF WINBOND W83783S

0.2

W83783S Application Circuit

Custom

Wednesday, July 22, 1998

Title

Size

Document Number

Rev

Date:

Sheet

VCC

+12V

3VCC

-12V

-5V

+12V

3VCC

CPU_VCORE

Beep Circuits

{

TO PIIX4

VOLTAGE SENSORING CIRCUIT

TEMPERATURE SENSORING CIRCUIT

Fan Speed Control Circuit

(SYSTEM FAN)

(CPU FAN)

CPU Voltage ID output

(Select one of the

following method)

Note:

1. VT1 is for CPU temperature

2. VT2 is for SYSTEM temperature

VCORE

+3.3VIN

+12VIN

GNDA

BEEP/GPO#

-12VIN

VREF

-5VIN

VID4
FANIN1

VT1/PII1

FANIN2

VREF

PWMOUT1

VCORE

OVT#

+3.3VIN

BEEP/GPO#

+12VIN

VID3

-12VIN
-5VIN

SMI#

GNDA
VID0

SCL

VID1

SDA

VID2

VREF

GNDA

SDA

SCL

VT1/PII1

VREF

VT1/PII1

GNDA

FANIN2

VID4
VID3
VID2
VID1
VID0

FANIN1

PWMOUT1

10K

LS1

SPEAKER

510

R5
R

4.7K

R7
R

4.7K

10K

CAP

10u

CAP

0.1u

R10

56K 1%

R11

232K 1%

R12
R

10K

R13

100

Q1
NPN

3904

R14

10K 1%

R15

28K 1%

R16
10K

R17

27K

R18
4.7K

JP1

HEADER 3

Q2
3906

R19

R20

4.7K

R21

510

1N4148

INDUCTOR

47u

R22
10K

R23

27K

R24
4.7K

JP2

HEADER 3

1N4148

R25
10K

R26
10K

R27
10K

R28
10K

R29
10K

WINBOND ELECTRONICS CORP.

R30

10K 1%

RT1

THERMISTOR

10K 1%

W83783S

VID4

FANIN1

FANIN2

FANIN3/PWMOUT1

OVT#

BEEP/GPO#

VID3

CLKIN

SMI#/PWMOUT2

GNDD

SCL

SDA

VID2

VID1

VID0

GNDA

-5VIN/VT2/PII2

-12VIN

+12VIN

+3.3VIN

VCORE

VREF

VT1/PII1

VCC

R31

30K 1%

R32

56K 1%

R33

120K 1%

CAPACITOR NON-POL

3300p

Q3
MOSFET N

2N7002

CLKIN

SMCLK

SMDAT

THRM#

EXTSMI#

PIIVID4
PIIVID3
PIIVID2
PIIVID1
PIIVID0

PIID+

PIID-

Электронный компонент: W83783S