Appendix C: Interface Pin Outs - Star Micronics LC-240C User Manual

Appendix C: Interface Pin Outs

Parallel Interface
Pin Name
1 STROBE
2 DATA0
3 DATA1
4 DATA2
5 DATA3
6 DATA4
7 DATA5
8 DATA6
9 DATA7
10 ACK
11 BUSY
12 PAPER
13 SELECT
14 AFXT
15
16 SIGNAL GND
17 CHASSIS
18 +5V
19 - 30 GND
31 RESET
32 ERROR
33 EXT GND
34 - 35
36 SELECT IN
Optional Serial Interface
Pin Name
1 GND
2 TXD
3 RXD
4 RTS
5 CTS
6
7 GND
8 - 10
11 RCH
12 - 19
20 DTR
21 - 25
Goes low for ≥0.5µs when active.
High when active.
High when active.
High when active.
High when active.
High when active.
High when active.
High when active.
High when active.
10µs low to acknowledge receipt of data.
Printer sets line low when ready to receive data.
High when paper runs out. Can be disabled with the User Setup Utility.
High when printer is on-line.
Normally high.
Not connected.
Signal ground
Chassis ground (isolated from signal ground)
+5V DC output from printer
Twisted pair ground return
Printer is reset when this signal goes low.
Low when printing cannot continue due to error.
External ground
Not connected.
Normally low.
Printer chassis ground
Data from printer
Data to printer
Always low
Low when computer is ready to send data. Printer ignores this signal.
Not connected.
Signal ground
Not connected.
Printer sets line low when ready to receive data. Same signal as Pin 20.
Not connected.
Printer sets line low when ready to receive data.
Not connected.
Function
Function
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