Appendix C: Interface Pin Outs - Star Micronics LC-1021 User Manual

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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 S-GND
17 F-GND
18 +5V
19 - 30 GND
31 RESET
32 ERROR
33 EXT GND
34 - 35
36 SELECT IN
Optional Serial Interface (IS-8H192 and SPC-8K)
Pin Name
1 F-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 0.5 s when active.
These signals represent information for the 1st through 8th bit of parallel data,
respectively. Each signal is HIGH when data is logical 1, and LOW when logical
0.
10 s low to acknowledge receipt of data.
Printer sets line low when ready to receive data.
High when paper runs out.
High when printer is on-line.
Printer ignores this signal
Not used.
Signal ground
Frame 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 used
Printer ignores this signal
Frame ground
Data from printer
Data to printer
Always space
Space when computer is ready to send data. Printer ignores this signal.
Not used.
Signal ground
Not used.
Printer sets line to space when ready to receive data. Same signal as Pin 20.
Not used.
Printer sets line to space when ready to receive data.
Not used.
Function
Function