User guide

116 170PAX4 User Guide 10/12/2004 57516L-001 Rev. 1
Data Ports
Parallel Port
Parallel Port
When communicating via the parallel port, the values selected must be the same as those used
by the host equipment connected to the print engine. Port selection for status information is
determined by the channel sending the request. The parallel port can be set for bidirectional or
unidirectional communication. The default setting is bidirectional.
A standard 36-pin parallel connector is available on the back of the print engine for connection
to the data source.
Table 15 shows the pin configuration and function of a standard computer-to-printer parallel
cable.
Table 15 • Parallel Cable Pin Configuration
36-Pin Connectors Description
1 nStrobe/HostClk
2–9 Data Bits 1–8
10 nACK/PtrClk
11 Busy/PtrBusy
12 PError/ACKDataReq
13 Select/Xflag
14 nAutoFd/HostBusy
15 Not used
16, 17 Ground
18 +5 V at 750 mA
The maximum current draw may be limited by option
configuration.
19–30 Ground
31 ninit
32 nFault/NDataAvail
33, 34 Not used
35 +5 V through a 1.8 KΩ Resistor
36 NSelectin/1284 active