Casio I/O-PB-12 Service Manual page 28

Electronic cash register option i/o board for casio ce-4700; casio tk-1300; casio tk-2300; casio tk-2700; casio tk-5100
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A
B
1
2
3
4
5
6
( 3/6 ) SCICLK
( 2/6 ) ( 3/6 ) ( 5/6 )
WR
( 2/6 ) ( 3/6 ) ( 5/6 )
RD
( 3/6 )
E
( 2/6 ) ( 3/6 ) CPURST
7
8
A
B
C
D
E
Vcc
R69
C27
C25
C26
GND
C
D
E
F
G
1
SLIPSFM
2
SLIPSCK
3
KDCSTM
4
KDCSCK
5
KDCSFM
6
DOTSCK
7
GND
VSS
8
DOTSFM
9
VDD
10
CLKOUT
11
WRITE
12
READ
13
E
14
RESET
15
BTSTS
16
CISTS
F
G
— 26 —
H
I
J
IC7
A0
9
A1
8
56
A2
7
RAMCE2
55
A3
6
RAMCE1
54
A4
5
RAMCE0
53
A5
4
RA18
52
A6
3
VSS
51
A7
2
RA17
50
RA16
RA16
49
RA15
RA15
48
RA14
RA14
47
VDD
46
RA13
RA13
45
A15
A15
44
A14
A14
43
A13
A8
9
A13
42
A12
A9
8
A12
41
A11
A10
7
A11
A11
6
A12
5
A13
4
A14
3
A15
2
GND
Board No.
E-I/O-PB-12 (4/6)
H
I
J
K
1
2
3
4
VCC
1
RA6
9
5
8
7
6
CA4
5
4
3
2
1
GND
6
VCC
1
RA4
9
8
7
6
CA3
5
7
4
3
2
1
GND
RA13–RA16 ( 5/6 )
A0–A15
( 2/6 )
8
D0–D7
( 3/6 )
( 5/6 )
E211763
K

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