Interface Specifications; The Parallel Interface - Epson LQ-2500 User Manual

Amendix H

Interface Specifications

The LQ-2500 is equipped with both a parallel and a serial interface.
Both are described in this appendix.
WARNING
Do not connect cables to both interfaces. This may damage your printer.

The Parallel Interface

This interface offers:
Connection using a standard 36-pin AMPHENOL 57-30360 connector
Synchronization of data transfer by external STROBE pulses
Handshaking using ACKNLG and BUSY signals
A full complement of control connections
TTL-compatibie signal levels on all connections for data and control
Paper-out detection through the BUSY PE and ERROR signals. with
the BUSY and ERROR warnings under software control.
Table H-1 shows the purpose of each connection. The figure below
shows timing.
Figure H-1.
Parrell interface timing diagram
Interface Specifications
H - 1