Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual page 152

Service Manual
Table A-5. CN6 Pin Assignments (Continued)
Pin No.
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69,70
71
72
73
74
75,76
77
78
79
80
81,82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
Rev. A
I/o
Signal Name
o
0
0
I
—
NC
o
—
NC
o
—
NC
MCLK o
—
NC
I
I
—
NC
VCLK o
0
RESET
0
—
I
I
TOP o
—
—
—
NC
—
o
—
+5 v
—
NC
—
1/0
—
—
o
A24
Description
Address bus bit 30
Address bus bit 31
Input ready signal
Not connected
Option select 1
Not connected
Read strobe
Not connected
Clock from CPU
Not connected
Board identification 1
Not connected
Video clock
Reset signal
Option select O
+5 VDC
Initialize signal from the option
Video
NMI signal
TOP signal for video l/F
Ground
Video out
Not connected
Reset in signal
+5 VDC
Not connected
Ground
Data bus bit 18
Data bus bit 19
Data bus bit 16
Data bus bit 17
Data bus bit 22
Data bus bit 23
Data bus bit 20
Data bus bit 21
Data bus bit 26
Data bus bit 27
Data bus bit 24
Data bus bit 25
Data bus bit 30
Data bus bit 31
Data bus bit 28
Data bus bit 29
Ground
Ground
Address bus bit 24
Appendix