Parallel Interface Unit User's Manual

6
Connector Signals and Functions
Pin Name Function
1 STROBE Goes low for ≥0.5µs when active.
2DATA0
3DATA1
4DATA2
5DATA3
6DATA4
7DATA5
8DATA6
9DATA7
10 ACK 10µs 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 Printer ignores this signal.
15 Not used.
16 SIGNAL GND Signal ground
17 F-GND 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 Printer ignores this signal
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.