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Table A-4. CN5 Pin Assignments
Pin No. Signal Name I/O Description
1
Vss
—
Ground
2
D0
I/O
Data bus bit 0
3
D16
I/O
Data bus bit 16
4
D1
I/O
Data bus bit 1
5
D17
I/O
Data bus bit 17
6
D2
I/O
Data bus bit 2
7
D18
I/O
Data bus bit 18
8
D3
I/O
Data bus bit 3
9
D19
I/O
Data bus bit 19
10
Vcc
—
+5 VDC
11
RD
O
Read strobe
12
A0
O
Address bit 0
13
A1
O
Address bit 1
14
A2
O
Address bit 2
15
A3
O
Address bit 3
16
A4
O
Address bit 4
17
A5
O
Address bit 5
18
A6
O
Address bit 6
19
A10
O
Address bit 10
20
D4
I/O
Data bus bit 4
21
D20
I/O
Data bus bit 20
22
D5
I/O
Data bus bit 5
23
D21
I/O
Data bus bit 21
24
D6
I/O
Data bus bit 6
25
D22
I/O
Data bus bit 22
26
D7
I/O
Data bus bit 7
27
D23
I/O
Data bus bit 23
28
A7
O
Address bit 7
29
A19
O
Address bit 19
30
Vcc
—
+5 VDC
31
A8
O
Address bit 8
32
A9
O
Address bit 9
33
A20
O
Address bit 20
34
EEP
O
Chip select
35
RESET
O
Reset signal
36
A21
O
Address bit 21
37
A22
O
Address bit 22
38
A23
O
Address bit 23
39
Vss
—
Ground
40
A11
O
Address bit 11
41
A13
O
Address bit 13
42
A14
O
Address bit 14
43
A12
O
Address bit 12
44
CS0
O
Chip select
45
CS1
O
Chip select
46
A18
O
Address bit 18
47
WR
O
Write enable
48
A17
O
Address bit 17
49
D8
I/O
Data bus bit 8
EPL-5500 Service Manual Appendix
Rev. A A-7