19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
47
48
49
50
51
52
IC, LC72343G
Pin No.
Pin Name
I/O
Description
IC DESCRIPTION
XOUT
TEST2
PA3
PA2
PA1
PA0
PB3
PB2
PB1
PB0
PC3
PC2
PC1
PC0
PD3
PD2
PD1
________
INT/PD0
PE1
BEEP/PE0
PF2
PF1/ADI1
PF0/ADI0
VSS
PG3/S20
PG2/S19
PG1/S18
COM2
COM1
DBR4
DBR3
DBR2
DBR1
O
I
I
I
I
I
O
O
O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
—
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
—
—
—
—
Connections for a 75kHz crystal oscillator element.
IC test pins. These pins must be tied to ground.
Special-purpose key return signal input port.
Special-purpose key source signal output port.
General-purpose I/O port.
General-purpose output port.
General-purpose input and A/D converter input shared function port.
Ground pin.
LCD driver segment output and general-purpose I/O shared function port.
LCD driver segment output pins.
LCD driver common output pins.
LCD power supply stepped-up voltage pins.
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9
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8
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4
2
9
8
TEL 13942296513
9
9
2
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9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
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