Epson EPL-9000, Service Manual

Page: 149 / 162

Appendix
“
Pin No.
Al
A3
A4
A6
A7
A8
A9
1
A22, 23
A24, 25
B2
B3
B4
B5
B6
B7
B8
B9
BIO
Table A-3. CN3 Pin Assignments
Signal
ASX
LDSX
NC
A2
A4
A6
A8
D7
D13
+5
UDSX
1
)10
)12
)14
)15
o
0
—
o
0
0
0
0
0
0
0
0
0
0
I/o
I/o
I/o
t/o
—
—
o
0
—
o
0
0
0
0
0
0
0
0
0
I/o
I/o
o
0
0
Description
Address strobe
Lower data strobe
Not connected
Font
enable
Address bus bit 2
bus bit 4
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
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
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
bus bit 11
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
“ e strobe
Font cartridge enabte
CPU
c
Rev.