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8. CIRCUIT DIAGRAM
A
B
1
SD7
SD6
SD5
SD4
2
SD3
SD2
SD1
SD0
AEN
3
4
SA09
SA08
SA07
SA06
SA05
5
SA04
SA03
SA02
SA01
SA00
6
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
7
I/O 6
I/O 7
I/O 8
8
A
B
C
D
E
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
TO MOTHER BOARD
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
(PORT)
SW3
IE0H
1
16
280H
2
15
290H
3
14
2A0H
4
13
320H
5
12
330H
6
11
340H
7
10
350H
8
9
2 3 4 5 6 7 8 9
RA7
1
GND
C
D
E
F
G
CN1
B1
B2
B3
B4
C1
B5
B6
C2
B7
B8
B9
B10
C3
B11
B12
GND
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
B29
B30
B31
VCC
GND
F
G
— 23 —
H
I
VCC
GND
–12V
+12V
(INT1)
SW1
IRQ3
1
14
IRQ4
2
13
IRQ5
3
12
IRQ7
4
11
IRQ10
5
10
IRQ11
6
9
IRQ12
7
8
(INT2)
SW2
IRQ3
1
14
IRQ4
2
13
IRQ5
3
12
IRQ7
4
11
IRQ10
5
10
IRQ11
6
9
IRQ12
7
8
CN5
TO MOTHER BOARD
Board No.
E-I/O-PB-12 (1/6)
H
I
J
K
1
RST
2
3
IOW
IOR
4
IRQ1
5
IRQ2
6
7
8
E312044
J
K
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