SM5953
8-Bit Micro-controller
15KB with ISP Flash
& 256B RAM embedded
Pin Description
40L
PDIP
1
2
3
4
5
6
40L
PLCC PQFP
40L
Symbol
P1.0/T2
P1.1/T2EX
P1.2
P1.3
P1.4
I/O
Description
2
3
4
5
6
7
40
41
42
43
44
1
I/O Bit 0 of port 1 & Timer 2 external input clock
I/O Bit 1 of port 1 & Timer 2 capture trigger
I/O Bit 2 of port 1
I/O Bit 3 of port 1
I/O Bit 4 of port 1
P1.5
I/O Bit 5 of port 1
7
8
2
P1.6
I/O Bit 6 of port 1
8
9
3
P1.7
I/O Bit 7 of port 1
9
10
11
13
14
15
16
17
18
19
20
21
22
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
40
41
42
43
44
4
5
7
8
RESET
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
I
Reset pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
I/O Bit 0 of port 3 & Serial interface channel receive data
I/O Bit 1 of port 3 & Serial interface channel Transmit data
I/O Bit 2 of port 3 & Interrupt 0
9
I/O Bit 3 of port 3 & Interrupt 1
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
29
30
31
32
33
34
35
36
37
38
I/O Bit 4 of port 3 & Timer 0 external input
I/O Bit 5 of port 3 & Timer 1 external input
I/O Bit 6 of port 3 & external memory write
I/O Bit 7 of port 3 & external memory read
I/O Crystal output
XTAL1
VSS
I/O Crystal input
I
Ground
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
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
O
O
I
program storage enable
address latch enable
external access
ALE
EA
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
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
I
Power supply
FOSVOS TEL: 021-58998693
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M074 Ver B SM5953 12/27/2013
- 7 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
