SM8951A Datasheet, PDF (4/17 Pages) SyncMOS Technologies,Inc – 8 - Bit Micro-controller with 4/8KB flash embedded

SyncMOS Technologies Inc.
September 2002
SM8951A/8952A
Pin Descriptions
40L 44L 44L
PDIP QFP PLCC
Pin# Pin# Pin#
Symbol
1 40 2 T2/P1.0
2 41 3 T2EX/P1.1
3 42 4 P1.2
4 43 5 P1.3
5 44 6 P1.4
6 1 7 P1.5
7 2 8 P1.6
8 3 9 P1.7
9 4 10 RES
10 5 11 RXD/P3.0
11 7 13 TXD/P3.1
12 8 14 #INT0/P3.2
13 9 15 #INT1/P3.3
14 10 16 T0/P3.4
15 11 17 T1/P3.5
16 12 18 #WR/P3.6
17 13 19 #RD/P3.7
18 14 20 XTAL2
19 15 21 XTAL1
20 16 22 VSS
21 18 24 P2.0/A8
22 19 25 P2.1/A9
23 20 26 P2.2/A10
24 21 27 P2.3/A11
25 22 28 P2.4/A12
26 23 29 P2.5/A13
27 24 30 P2.6/A14
28 25 31 P2.7/A15
29 26 32 #PSEN
30 27 33 ALE
31 29 35 #EA/VPP
32 30 36 P0.7/AD7
33 31 37 P0.6/AD6
34 32 38 P0.5/AD5
35 33 39 P0.4/AD4
36 34 40 P0.3/AD3
37 35 41 P0.2/AD2
38 36 42 P0.1/AD1
39 37 43 P0.0/AD0
40 38 44 VDD
I/O Names
Active
i/o timer 2 clock out & bit 0 of port 1
i/o timer 2 control & bit 1 of port 1
i/o bit 2 of port 1
i/o bit 3 of port 1
i/o bit 4 of port 1
i/o bit 5 of port 1
i/o bit 6 of port 1
i/o bit 7 of port 1
H i Reset
i/o Receive data & bit 0 of port 3
i/o Transmit data & bit 1 of port 3
L/ - i/o low true interrupt 0 & bit 2 of port 3
L/ - i/o low true interrupt 1 & bit 3 of port 3
i/o Timer 0 & bit 4 of port 3
i/o Timer 1 & bit 5 of port 3
L/ - i/o external memory write & bit 6 of port 3
L/ - i/o external memory read & bit 7 of port 3
o Crystal out
i Crystal in
Sink Voltage, Ground
i/o bit 0 of port 2 & bit 8 of external memory address
i/o bit 1 of port 2 & bit 9 of external memory address
i/o bit 2 of port 2 & bit 10 of external memory address
i/o bit 3 of port 2 & bit 11 of external memory address
i/o bit 4 of port 2 & bit 12 of external memory address
i/o bit 5 of port 2 & bit 13 of external memory address
i/o bit 6 of port 2 & bit 14 of external memory address
i/o bit 7 of port 2 & bit 15 of external memory address
L o program storage enable
- o address latch enable
L i external access & VPP
i/o bit 7 of port 0 & data/address bit 7 of external memory
i/o bit 6 of port 0 & data/address bit 6 of external memory
i/o bit 5 of port 0 & data/address bit 5 of external memory
i/o bit 4 of port 0 & data/address bit 4 of external memory
i/o bit 3 of port 0 & data/address bit 3 of external memory
i/o bit 2 of port 0 & data/address bit 2 of external memory
i/o bit 1 of port 0 & data/address bit 1 of external memory
i/o bit 0 of port 0 & data/address bit 0 of external memory
Drive Voltage, +5 Vcc
Specifications subject to change without notice,contact your sales representatives for the most recent information.
4/17
Ver 1.0 PID 8951A/8952A 09/02