SyncMOS Technologies International. Inc.
SM79108
Pin Descriptions
40L
44L
44L
PDIP QFP PLCC
Pin# Pin# Pin#
Symbol
P1.0/T2
Active I/O
(GPIO)
Names
1
40
41
42
43
44
1
2
i/o bit 0 of port 1 & timer 2 clock out
i/o bit 1 of port 1 & timer 2 control
i/o bit 2 of port 1 & SPWM channel
i/o bit 3 of port 1
2
3
P1.1/T2EX
P1.2/SPWM
P1.3
3
4
4
5
5
6
P1.4
i/o bit 4 of port 1
6
7
P1.5/PWM
i/o bit 5 of port 1 & PWM channel
i/o bit 6 of port 1
7
2
8
P1.6
8
3
9
P1.7
i/o bit 7 of port 1
9
4
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
RES
H
i
Reset
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
5
P3.0/RXD
i/o bit 0 of port 3 & receive data
7
P3.1/TXD
i/o bit 1 of port 3 & transmit data
8
P3.2/#INT0
P3.3/#INT1
P3.4/T0/ADC0
P3.5/T1/ADC1
P3.6/#WR/ADC2
P3.7/#RD/ADC3
XTAL2
-/L
-/L
i/o bit 2 of port 3 & low true interrupt 0
9
i/o bit 3 of port 3 & low true 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
17
28
39
6
i/o bit 4 of port 3 & ADC channel 0 & Timer 0
i/o bit 5 of port 3 & ADC channel 1 &Timer 1
i/o bit 6 of port 3 & ADC channel 2 & external memory write
i/o bit 7 of port 3 & ADC channel 3 & external memory read
o
i
Crystal out
XTAL1
Crystal in
VSS
Sink Voltage, Ground
P2.0/A8/COM0
P2.1/A9/COM1
P2.2/A10/COM2
P2.3/A11/COM3
P2.4/A12/SEG0
P2.5/SEG1
P2.6/SEG2
P2.7/SEG3
#PSEN/SEG4
ALE/SEG5
#EA
i/o bit 0 of port 2 & bit 8 of external memory address & LCCD common 0 output
i/o bit 1 of port 2 & bit 9 of external memory address & LCCD common 1 output
i/o bit 2 of port 2 & bit 10 of external memory address & LCCD common 2 output
i/o bit 3 of port 2 & bit 11 of external memory address & LCCD common 3 output
i/o bit 4 of port 2 & bit 12 of external memory address & LCCD seg 0 output
i/o bit 5 of port 2 & LCCD seg 1 output
i/o bit 6 of port 2 & LCCD seg 2 output
i/o bit 7 of port 2 & LCCD seg 3 output
o
o
i
program storage enable & LCCD seg 4 output
address latch enable & LCCD seg 5 output
external access
L
P0.7/AD7/SEG6
P0.6/AD6/SEG7
P0.5/AD5/SEG8
P0.4/AD4/SEG9
P0.3/AD3/SEG10
P0.2/AD2/SEG11
P0.1/AD1/SEG12
P0.0/AD0/SEG13
VDD
i/o bit 7 of port 0 & data/address bit 7 of external memory & LCCD seg 6 output
i/o bit 6 of port 0 & data/address bit 6 of external memory & LCCD seg7 output
i/o bit 5 of port 0 & data/address bit 5 of external memory & LCCD seg 8 output
i/o bit 4 of port 0 & data/address bit 4 of external memory & LCCD seg 9 output
i/o bit 3 of port 0 & data/address bit 3 of external memory & LCCD seg 10 output
i/o bit 2 of port 0 & data/address bit 2 of external memory & LCCD seg 11 output
i/o bit 1 of port 0 & data/address bit 1 of external memory & LCCD seg 12 output
i/o bit 0 of port 0 & data/address bit 0 of external memory & LCCD seg 13 output
i
Drive Voltage, Vcc
23 P4.0
34 P4.1
P4.2
12 P4.3
i/o bit 0 of Port 4
i/o bit 1 of Port 4
i/o bit 2 of Port 4
i/o bit 3 of Port 4
1
Specifications subject to change without notice,contact your sales representatives for the most recent information.
4/26
Ver 2.1 SM79108 08/2006
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
