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Thefollowingdescribesthepinoutoftheparallel(Centronics-type)inter-
faceconnector(signalswhicharelow whenactiveare overlined):
Pin Name Function
1 I STROBE
Goes fIom high to low (for 20.51.M)when active
I
I 2 I DATAO I Hi~hwhenactive
I
~
DATA1 High when active
4 DATA2 High when active
I
5 t DATA3
I Hi~hwhen active
I
6 DATA4 High when active
7 DATA5 High when active
8 DATA6 High when active
9 DATA7 High when active
10 ACK 5ys low pulse acknowledges receipt of data
11 BUSY
Low when printer ready to receive data
12 PAPER High when paper out. Can be disabled with DIP switch
setting
13 SELECT
High when urinter is on-line
I 14.15 I N/C
I
I
WND~~~~utfrom~intc
Chassisground(Isolatedfromsignalground)
19-30 GND Twisted pair ground return
31 RESET
When this input signal is low, printer is reset
32 ERROR
Outputs low when printer cannot continue, due to an error
I 33 I EXT GND I External mound
I
34,35
N/C
36 SELECT IN Always high
102