Epson FX-1180 - Impact Printer, Service Manual

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Appendix
EPSON FX-880/FX-1180 Service Manual A-3
Table A-3. Connector Pin Assignments-CN1 (continued)
Pin I/O Signal Function
19 to
30

GND Signal ground.
31 In /INIT Initializes the printer.
32 Out /ERROR Indicates an error condition.
33

GND Signal ground.
34

NC Not connected.
35 Out +5 V
This line is pulled up to +5 V through 1.0K
Ω
.
36 Out /SLIN Always HIGH when the printer is powered on.
Table A-4. Connector Pin Assignments-CN2
Pin I/O Signal Function
1 to 6

+5 +5 VDC line
7 Out TXD Transmit data
8 Out /READY Ready to receive data
9 In RXD Receiving data
10

NC No connected
11 Out /RST Reset
12 Out INH Inhibit
13 In /CMREQ Command request
14 In /WRRDY Write ready
15 In /RDRDY Read request
16 Out /WR Write
17 Out /RD Read
18 Out /CS Chip select
19 to 24

GND Ground
25 Out A3 Address bus bit 3
26 Out A2 Address bus bit 2
27 Out A1 Address bus bit 1
28 Out A0 Address bus bit 0
29 In/Out D7 Data bus bit 7
30 In/Out D6 Data bus bit 6
31 In/Out D5 Data bus bit 5
32 In/Out D4 Data bus bit 4