Citizen Systems iDP-3551 Printer User Manual


 
9.3 Input and Output Signals
9.3.1 Input and Output Signals
(1) Input signals to the printer
DATA : An 8-bit parallel signal. (Active “High”)
STB : A strobe signal to read the 8-bit data. (Active “Low”)
RESET : A signal to reset the printer from the outside. (Active “Low”)
(2) Output signals from the printer
ACK : An 8-bit data request signal. A pulse signal output at the end of the BUSY signal.
(Active “Low”)
BUSY : A signal to indicate the BUSY status of the printer. Input new data when at "Low".
(Active “High”)
FAULT : A signal turned to "Low" when the printer has an alarm. At this time, all the control
circuits in the printer stop. (Active “Low”)
SELECT : A signal to show whether the printer is selected (On-line) or deselected. (Active
“High”)
COMPULSION
: A signal to show the status of the drawer switch. (Active “High”)
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 resistor. (Factory use only)