Star Micronics ATAR LC-500 - Manual (Page 59)

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APPENDIX
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.
Parallel Interface
Connector Signals
Pin Name Function
1 STROBE Goes low for
≥
0.5
µ
s when active.
2 DATA0
3 DATA1
4 DATA2
5 DATA3
6 DATA4
7 DATA5
8 DATA6
9 DATA7
10 ACK 10
µ
s low to acknowledge receipt of data.
11 BUSY Printer sets line low when ready to receive data.
12 PAPER High when paper runs out.
13 SELECT High when printer is on-line.
14 AFXT This signal is used when the mode is nibble mode.
15 Not used.
16 SIGNAL GND Signal ground
17 CHASSIS Chassis ground (isolated from signal ground)
18 +5V +5V DC output from printer
19~30 GND Twisted pair ground return
31 RESET Printer is reset when this signal goes low.
32 ERROR Low when printing cannot continue due to error.
33 EXT GND External ground
34~35 Not used
36 SELECT IN This signal is used when the mode is nibble mode.