Lexmark Printer User Manual page 351

The following illustration shows the pin assignments for connecting the 25-pin
connector to the 36-pin connector. The symbol * indicates an active low signal.
Printer
Side
36-Pin
Connector
1284-C
The parallel interface consists of an 8-bit parallel data bus with the following
characteristics:
•
Uses 17 of the 36 positions on the printer connector, as follows:
– The host system controls 12 lines, which it uses to send data and com-
mands to the printer.
– The printer controls five lines. The printer uses two lines to notify the com-
puter when data is transferred successfully and three lines to report printer
status.
•
Controls synchronization with an externally supplied STROBE* pulse.
8-14
Computer
Side
25-Pin
Connector
Note: Lexmark IEEE 1284 compliant cables
are supported up to 20 feet. Cable lengths
greater than 20 feet are not supported. The
cable drawing to the left is a functional
representation of the Lexmark cables; it does
not reflect correct pairing of leads or unused
pairs.
Interfaces