Citizen Systems iDP-3550 User Manual
Page 39
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
Ω
resistor. (Factory use only)