Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual page 149

Appendix
Pin No.
Al
A3
A4
A6
A7
A8
A9
A22, 23
A24, 25
B2
B3
B4
B5
B6
B7
B8
B9
BIO
Table A-3. CN3 Pin Assignments
Signal
o
ASX
0
LDSX
—
NC
o
0
A2
0
A4
0
A6
0
A8
0
0
0
0
0
0
I/o
I/o
I/o
D7
t/o
D13
—
—
+5 v
o
UDSX
0
—
o
0
0
0
0
0
0
0
0
0
I/o
)10
)12
)14
I/o
)15
o
0
0
Description
Address strobe
Lower data strobe
Not connected
Font cattridge enable
Address bus bit 2
Address bus bit 6
Address bus bit 8
Address bus bit 10
Address bus bit 12
Address bus bit 14
Address bus bit 16
Address bus bit 18
Address bus bit 20
Data bus bit 1
Data bus bit 3
Data bus bit 5
Data bus bit 7
Data bus bit 9
Data bus bit 11
Data bus bit 13
Ground
+5 VDc
Upper data strobe
Address decode
Ground
Address bus bit 1
Address bus bit 3
Address bus bit 5
Address bus bit 7
Address bus bit 9
Address bus bit 13
Address bus bit 15
Address bus bit 17
Address bus bit 19
Data bus bit O
Data bus bit 2
Data bus bit 4
Data bus bit 6
Data bus bit 8
Data bus bit 10
Data bus bit 12
Data bus bit 14
Data bus bit 15
Font cartridge enabte
c
Rev. A