SyncMOS Technologies International, Inc.
SM8951A/8952A
8-Bits micro-controller
With 4/8KB flash embedded
Product List
SM8951A/8952AL25, 25MHz 4/8KB internal flash MCU
SM8951A/8952AC25, 25MHz 4/8KB internal flash MCU
SM8951A/8952AC40, 40MHz 4/8KB internal flash MCU
Features
Working Voltage: 3.0V ~ 3.6V For L Version.
4.5V ~ 5.5V For C Version.
General 8052 family compatible
12 clocks per machine cycle
4/8K internal flash memory
256 bytes data RAM
2/3 16 bit timers/counters
Four 8-bit I/O ports
Full duplex serial channel
Bit operation instruction
Industrial Level
8-bit unsigned division
8-bit unsigned multiply
BCD arithmetic
Direct addressing
Indirect addressing
Nested interrupt
Two priority level interrupt
A serial I/O port
Power save modes:
Idle mode and Power down mode
Code protection function
One watch dog timer(WDT)
Low EMI (inhibit ALE)
Description
The SM8951A/8952A series product is an 8-bit single
chip micro controller with 4/8 KB flash embedded. It
provides hard-ware features and a powerful instruction
set, necessary to make it a versatile and cost effective
controller for those applications demand up to 32 I/O
pins or need up to 4/8 KB flash memory either for
program or for data or mixed.
To program the flash block, a commercial programmer
is capable to do it.
Ordering Information
yymmv
SM8951A/8952AihhkL
yy: year, mm: month
v: version identifier{ , A, B,…}
i: process identifier {L=3.0V~3.6V,C=4.5V~ 5.5V}
hh: working clock in MHz {25, 40}
k: package type postfix {as below table}
L:PB Free identifier
{No text is Non-PB Free，”P”is PB Free}
Taiwan
6F, No.10-2 Li- Hsin 1st Road ,
Science-based Industrial Park,
Hsinchu, Taiwan 30078
TEL: 886-3-567-1820
886-3-567-1880
FAX: 886-3-567-1891
886-3-567-1894
Postfix
P
J
Q
U
Package
40L PDIP
44L PLCC
44L PQFP
44L LQFP
Pin / Pad Configuration
Page 2
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Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M014 Ver: C SM8951A/8952A
1
01/2012
SyncMOS Technologies International, Inc.
SM8951A/8952A
8-Bits micro-controller
With 4/8KB flash embedded
Pin Configuration
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RESET
RXD/P3.0
TXD/P3.1
INT0/P3.2
INT1/P3.3
T0/P3.4
T1/P3.5
WR/P3.6
RD/P3.7
XTAL2
XTAL1
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VDD
P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
ALE
PSEN
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M014 Ver: C SM8951A/8952A
2
SyncMOS
01/2012
SyncMOS Technologies International, Inc.
SM8951A/8952A
8-Bits micro-controller
With 4/8KB flash embedded
P0.0/AD0
P0.1/AD1
42
P0.2/AD2
41
6
5
4
3
2
1
44
43
40
39
38
37
36
35
34
33
32
31
30
29
P1.5
P1.6
P1.7
RESET
RXD/P3.0
NC
TXD/P3.1
INT0/P3.2
INT1/P3.3
T0/P3.4
T1/P3.5
P0.3/AD3
VDD
P1.4
P1.3
P1.2
P1.1
P1.0
NC
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
NC
ALE
PSEN
P2.7/A15
P2.6/A14
P2.5/A13
17
18
16
15
14
13
12
11
10
9
8
7
19
20
21
22
23
24
25
26
27
28
WR/P3.6
RD/P3.7
VSS
A8/P2.0
A9/P2.1
XTAL2
XTAL1
A10/P2.2
A11/P2.3
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M014 Ver: C SM8951A/8952A
3
A12/P2.4
NC
01/2012
SyncMOS Technologies International, Inc.
SM8951A/8952A
8-Bits micro-controller
With 4/8KB flash embedded
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
P2.7/A15
25
P2.6/A14
24
33
32
31
30
29
28
27
26
AD3/P0.3
AD2/P0.2
AD1/P0.1
AD0/P0.0
VDD
NC
P1.0
P1.1
P1.2
P1.3
P1.4
34
35
36
37
38
39
40
41
42
43
44
23
P2.5/A13
22
21
20
19
18
17
16
15
14
13
12
PSEN
ALE
NC
EA
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8
NC
VSS
XTAL1
XTAL2
P3.7/RD
P3.6/WR
10
RESET
RXD/P3.0
P1.5
P1.6
P1.7
TXD/P3.1
T0/P3.4
INT0/P3.2
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M014 Ver: C SM8951A/8952A
4
INT1/P3.3
T1/P3.5
NC
11
1
2
3
4
5
6
7
8
9
01/2012
SyncMOS Technologies International, Inc.
SM8951A/8952A
8-Bits micro-controller
With 4/8KB flash embedded
Block Diagram
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M014 Ver: C SM8951A/8952A
5
01/2012
