Table of Contents
Advertisement
Parallel Interface
(continued)
PRIME -This signal is input from the data source. The input buffer is
cleared in anticipation of receiving new data for printing.
FAULT
-The FAULT signal is high under normal operating conditions. The
occurrence of a printer fault. paper out. or deselect generates a fault which
lowers the FAULT signal. Hardware strap H32 permits inversion of this
signal.
+5 VDC
-This voltage is intended to tell the data source that the printer is
connected to the host.
it
is turned on. and the logic voltage is present in the
printer.
PI -
The source-generated PAPER INSTRUCTION lead is used to inform the
printer that the information on the data lines is to be treated as a paper
move command or page format data.
CENTRONICS Interface Signal Timing
DATA
STB
BUSY
AG781L
--------------------
KEY
tds - Minumum data setup• 0 sec.
tdh - Minumum data hold time - 0 sec.
tsw - Minumum
STB
width - 500 ns.
tad -Maximum
7'CK
delay from
STB
trailing
edge -
3.0 µs
tbd1 - Maximum delay of BUSY after
STB
leading edge - 1.2 µs
taw - Typical attack width - 2.4 µs
Figure
4-4
4-6
U~r's Manual
Nov93
Advertisement
Table of Contents
