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iDP-3420/3421/3423 User’s Manual
43 CITIZEN
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np
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(1) Input signals to the printer
·
DATA : An 8-bit parallel signal. (Positive logic)
·
STB : A strobe signal to read the 8-bit data. (Negative logic)
·
RESET : A signal to reset the printer from the outside. (Negative logic)
(2) Output signals from the printer
·
ACK : An 8-bit data request signal. A pulse signal output at the end of the
BUSY signal. (Negative logic)
·
BUSY : A signal to indicate the BUSY status of the printer. Input new data
when at "LOW". (Positive logic)
·
FAULT : A signal turned to "LOW" when the printer has an alarm. At this time,
all the control circuits in the printer stop. (Negative logic)
·
SELECT : A signal to show whether the printer is selected (On-line) or deselected.
(Positive logic)
·
COMPULSION
: A signal to show the status of the drawer switch. (Positive logic)
·
PE : A signal to show that the paper has run out. Normal at the "LOW" level,
but turned to the "HIGH" level when the paper has run out.
(3) Power related signal
·
GND : Common ground on the circuits
·
Vcc : A +5 V signal. Connected via a 3.3k
W
resistor.