I
11.3 PINFUNCTIONSON INTERFACES●ParallelInterface
Function
GoesfromHigh toLow (for at
least 0.5 microseconds)when
dataarevalid.
2DATA1 IN
3DATA2 IN
$DATA3 IN Eight-bit character data.
5DATA4 IN DATA8 is the most significant
6DATA5 IN bit; DATA1 is the least
7DATA6 IN significant bit, High is logic 1
andLow is logic O.
BDATA7 IN
9DATA8 IN
10 ACK OUT Alowpulseacknowledges
receiptofdata.
11 BUSY OUT Lowwhenthe printerisready
toacceptdata.
12 PAPER OUT GoesHighiftheprinterruns
OUT outof paper.
13 SELECTED OUT Highwhentheprinteris online
14-15 N/C Unused
16 SIGNAL Signalground.
,GND
17 CHASSIS Printer’schassisground,
GND isolatedfromsignalground.
18 +5VDC OUT Externalsupplyof+5VDC
19-30 GND Twisted pair return signal
groundlevel.
31 —
RESET IN Low input resets theprinter to
its power-oncondition.
32 —
ERROR OUT Goeslowto siaal that the
printercannot@nt dueto an
errorcondition.
33-36 N/C Unused
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