Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer, Service Manual

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Appendix
A-5. Pin Assignments
Pin No. Signal Name
Description
1,2
+5
—
+5
VDC
3,4
—
Ground
5
D2 I/o Data bus bit 2
6 D3 Data bus bit 3
7 Do I/o Data bus bit O
8
I/o Data bus bit 1
9 I/o Data bus bit 6
10 D7 I/o Data bus bit 7
11 Data bus bit 4
12 D5 I/o Data bus bit 5
13 Data bus bit 10
14 Data bus bit 11
15 D8 Data bus bit 8
16
Data bus bit 9
17
Data bus bit 14
18 Data bus bit 15
19 Data bus bit 12
20
Data bus bit 13
21 BWE1 o Byte enables 1
22 A2
o Address bus bit 2
23,24
—
Ground
25 A5
o
Address bus bit 5
26 A6
o
Address bus bit 6
27 A3
o
Address bus bit 3
28 A4
o
Address bus bit 4
29
o
Address bus bit 9
30
o bus bit 10
31 A7
o
Address bus bit 7
32 A8
o
Address bus bit 8
33
o
Address bus bit
13
34
o
Address bus bit 14
35 1
0
Address bus bit 11
36 o Address bus bit 12
37 o Address bus bit 17
38
o
Address bus bit 18
39
o
Address bus bit 15
40
o
Address bus bit 16
41
o
Address
bus bit 21
42 o Address bus bit 22
43
o Address bus bit 19
44 o Address bus bit 20
45
o
Address bus bit 26
46
o
Address bus bit 27
47 NC
—
Not connected
48 o Write enable
49 o Address bus bit 28
50 o Address bus bit 29
51 o Address strobe
.
.
Rev.