Casio I/O-PB-12 Service Manual page 27

A B
1
2
VCC
3
4
GND
2
X2
5
1
3
6
7
8
A B
C D E
VCC
1
RA2
2 2
3 3
( 2/6 ) ( 4/6 ) ( 5/6 )
4 4
5 5
CA1
6 6
7 7
8 8
9 9
C12
1
C13
GND
C14
GND
R58
R59
R60
GND
2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9
RA8
C24 R63
R67 R68
GND
C D E
F G
VCC
C18 C17
GND
1 1
RA9
F G
— 25 —
H I J
D0–D7
A0–A15
INT2
INT1
CPURST ( 2/6 ) ( 4/6 )
TXD
RXD
RTS
SCICLK ( 4/6 )
Board No.
E-I/O-PB-12 (3/6)
H I J
K
1
2
3
4
5
6
7
8
E211762
K