Epson LQ-2550, Technical Manual

Page: 286 / 301

Table A-20. CN4 Pin Assignments
Pin NO. Signal
Description
1
D 5 Data bus 5
2 D 4 Data bus 4
3 D 7 Data bus 7
4 AB 1
0
Bank 1
5
A5
o
Address bus 5
6
A6
o
Address bus 6
7
A lO
o
Address bus 10
8
I Reset signal
9 —
10 A9 o Address bus 9
11 A8 o Address bus 8
12 D2 Data bus 2
13 Data bus 1
14 RD o Read strobe
15 DO Data bus O
16 AO o Address bus O
17 D3
Data bus 3
18 CG
o select
19 Data bus 6
20 o Address bus
21 A4 o Address bus 4
22 WR o Write strobe
23 A7 o Address bus 7
24
+ 5
o +
5V DC
2 5 Al 1 0
Address bus 11
26
PROG Program select
27 Al 2
0 Address bus 12
28
o Address bus 13
29 A l
o Address bus 1
3 0
ABO o
Bank O
31 A2
o
Address bus 2
3 2 A 3
o Address bus 3
A-4