Casio I/O-PB-11 Service Manual

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3. CIRCUIT EXPLANATIONS
3-1. Address selection
A3
GND
A2
GND
A1
GND
A0
GND
VCC
VCC
IOCS
VCC
RESET
VCC
E
VCC
3
1
2
IC15
C8
VCC
4
5
6
IC12
10
8
9
IC12
8
4
5
IC15
GND
C23
GND
C37
VCC
D2
D3
RXD
GND
D4
D5
D6
D7
TXCLK
WR
CS
C/D
RD
RXRDY
D1
D0
VDD
RXCLK
DTR
RTS
DSR
RESET
CLK
TXD
TXEMP
CTS
SYNC
TXRDY
GND
GND
IRQ
GND
WR
GND
RD
GND
A7
GND
D6
GND
D5
GND
D4
GND
D3
-12V
D2
-12V
D1
12V
D0
12V
IC1
32
GND
C30
C29
1G
1A
1B
1Y0
1Y1
1Y2
1Y3
GND
VCC
2G
2A
2B
2Y0
2Y1
2Y2
2Y3
GND
Q12
Q6
Q5
Q7
Q4
Q3
Q2
GND
VCC
Q11
Q10
Q8
Q9
RST
CLK
Q1
GND
VCC
R27
C31
C32
C33
C36
VCC
GN
D
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
IC12
IC14
11
12
12
13
13
11
IC17
9
10
R26
R25
R11
IC12
1
2
3
IC15
12
13
11
IC4
14
15
IC1
9
10
IC4
11
12
C9
C10
C11
IC4
910
IC4
76
IC4
5
4
IC1
7
6
IC5
5
6
R9
R8
R7
R6
R5
R4
R3
C1 C6
+
-12V
+12V
R2
R1
IC4
3
2
IC4
5
4
IC14
IC14
3
1
2
9
10
8
IC14
4
5
6
IC15
IC16
IC7
D2
D3
D4
D5
D6
D7
D1
D
0
GND
R10
GND
D7
D6
D5
D4
D3
D2
D1
D0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
C7
+
+12V
-12V
V+
V-
To E570-1To E570-1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CS for IC10
(C-In line controller)
RDTM
CLK for IC9
USART
D7
According to the address of main CPU, the decorder selects the following optional devises.
IC No. Pin No. CPU address Descriptions
IC17 4 1Y0 0034H & RD="L" RDTM gate enable of IC8 (For scale data read)
10 2Y2 0036H Chip selection of C-In line controller
IC14 11 CLK 0034H & WR="L" Clock signal of IC9 (For C-In line controller data)
IC15 6 CS 0030H Chip selection of USART (Data)
0031H Chip selection of USART (Control status)

Casio I/O-PB-11 Specifications

General

Brand	Casio
Model	I/O-PB-11
Category	Cash Register
Language	English