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Semiconductor
MSM80C88A-10RS/GS/JS
GENERAL DESCRIPTION
The MSM80C88A-10 is internal 16-bit CPUs with 8-bit interface implemented in Silicon Gate
CMOS technology. It is designed with the same processing speed as the NMOS8088-1, but with
considerably less power consumption.
The processor has attributes of both 8 and 16-bit microprocessor. It is directly compatible with
MSM80C86A-10 software and MSM80C85AH hardware and peripherals.
FEATURES
8-Bit Data Bus interface
16-Bit Internal Architecture
1 Mbyte Direct Addressable Memory Space
Software Compatible with MSM80C86A-10
Internal 14-Word by 16-bit Register Set
24-Operand Addressing Modes
Bit, Byte, Word and String Operations
8 and 16-bit Signed and Unsigned Arithmetic Operation
From DC to 10 MHz Clock Rate (Note)
Low Power Dissipation (10mA/MHz)
Bus Hold Circuitry Eliminated Pull-Up Resistors
40-pin Plastic DIP (DIP 40-P-600-2.54): (Product name: MSM80C88A-10RS)
44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM80C88A-10JS)
56-pin Plastic QFP (QFP56-P-1519-1.00-K): (Product name: MSM80C88A-10GS-K)
(Note) 10 MHz Spec. is not compatible with Intel 8088-1 spec.
Semiconductor
MSM80C88A-10RS/GS/JS
8-Bit CMOS MICROPROCESSOR
E2O0011-27-X2
This version: Jan. 1998
Previous version: Aug. 1996
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Semiconductor
MSM80C88A-10RS/GS/JS
PIN CONFIGURATION (TOP VIEW)
40 pin Plastic DIP
16
15
14
13
GND
20
19
18
17
GND
1
2
3
4
5
6
7
8
9
10
11
12
32
31
30
29
28
27
26
37
38
39
40
36
35
34
33
25
RESET
A
15
A
16
/S
3
A
17
/S
4
A
18
/S
5
A
19
/S
6
SS
0
(HIGH)
MN/MX
RD
HOLD(RQ/GT0)
HLDA(RQ/GT1)
WR(LOCK)
IO/M(S
2
)
DT/R(S
1
)
DEN(S
0
)
ALE(QS
0
)
INTA(QS
1
)
TEST
READY
24
23
22
21
V
CC
NMI
INTR
CLK
A
9
A
8
AD
7
AD
6
AD
5
AD
4
AD
3
AD
2
AD
1
AD
0
A
14
A
13
A
12
A
11
A
10
56
A
11
NC
HOLD(RQ/GT0)
NC
42
41
40
39
38
37
36
NC
A
19
/S
6
SS
0
(HIGH)
MN/MX
RD
35
34
33
32
31
30
29
NC
HLDA(RQ/GT1)
WR(LOCK)
IO/M(S
2
)
DT/R(S
1
)
DEN(S
0
)
1
2
3
4
5
6
7
NC
A
10
A
9
A
8
AD
7
AD
6
NC
8
9
10
11
12
13
14
NC
AD
5
AD
4
AD
3
AD
2
AD
1
AD
0
56 pin Plastic QFP
39
38
37
36
35
34
33
NC
A19/S6
HIGH FIX(SS0)
MN/MX
RD
HOLD(RQ/GT0)
HLDA(RQ/GT1)
A
10
A
9
A
8
AD
7
AD
6
AD
5
AD
4
18
19
20
21
22
23
24
NC
NM1
INTR
CLK
GND
NC
RESET
6
5
4
3
2
1
44
A
11
A
12
A
13
A
14
GND
NC
7
8
9
10
11
12
13
32
31
30
29
WR(LOCK)
M/IO(S
2
)
DT/R(S
1
)
AD
3
AD
2
AD
1
AD
0
14
15
16
17
DEN(S
0
)
V
CC
25
26
27
28
READY
TEST
(
INTA
)QS
1
(ALE)QS
0
43
42
41
40
A
15
A
16
/S
3
A
17
/S
4
A
18
/S
5
44 pin Plastic QFJ
55
A
12
54
A
13
53
A
14
52
NC
51
GND
50
NC
49
V
CC
48
V
CC
47
NC
46
A
15
45
A
16
/S
3
44
A
17
/S
4
43
A
18
/S
5
15
NMI
16
INTR
17
CLK
18
NC
19
NC
20
GND
21
V
CC
22
NC
23
NC
24
RESET
25
READY
26
TEST
27
INTA
(QS
1
)
28
ALE(QS
0
)
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Semiconductor
MSM80C88A-10RS/GS/JS
DC CHARACTERISTICS
Max.
"L" Output Voltage
V
OL
0.4
V
"H" Output Voltage
V
OH
--
V
Parameter
Unit
Symbol
Min.
--
3.0
V
CC
0.4
I
OL
= 2.5 mA
I
OH
= 2.5 mA
I
OH
= 100 mA
Conditions
Input Leak Current
I
LI
+1.0
mA
Output Leak Current
I
LO
+10
mA
1.0
10
0
V
IN
V
CC
V
O
= V
CC
or GND
Typ.
Input Leakage Current
(Bus Hold Low)
I
BHL
400
mA
50
V
IN
= 0.8 V
*3
Input Leakage Current
(Bus Hold High
I
BHH
400
mA
50
V
IN
= 3.0 V
*4
Bus Hold Low Overdrive
I
BHLO
600
mA
--
*5
Bus Hold High Overdrive
I
BHHO
600
mA
--
*6
Operating Power
Supply Current
I
CCS
10
Standby Power
Current
I
CC
500
--
--
V
IL
= GND
V
IH
= V
CC
V
IN
= V
CC
or GND
Outputs Unloaded
CLK = GND or V
CC
mA/MHz
mA
Input Capacitance
C
IN
10
pF
Output Capacitance
C
OUT
15
pF
--
--
I/O Capacitance
C
I/O
20
--
--
--
--
--
--
--
--
--
--
--
--
--
pF
*7
*7
*7
--
(V
CC
= 4.5 to 5.5 V, Ta = 40C to +85C)
*3 Test conditions are to lower V
IN
to GND and then raise V
IN
to 0.8 V on pins 2-16, and 35-39.
*4 Test conditions are to raise V
IN
to V
CC
and then lower V
IN
to 3.0 V on pins 2-16, 26-32, and 34-
39.
*5 An external driver must source at least I
BHLO
to switch this node from LOW to HIGH.
*6 An external driver must sink at least I
BHHO
to switch this node from HIGH to LOW.
*7 Test Conditions: a) Freq = 1 MHz.
b) Ummeasured Pins at GND.
c) V
IN
at 5.0 V or GND.
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