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iDP-3210 User’s Manual
CITIZEN
34
6.1.3 I/O SIGNALS
(1) Input Signals to the Printer
l DATA : 8-bit parallel signal (positive logic)
l STB : Strobe signal to read 8-bit data (negative logic)
l RESET : Signal to reset the entire printer (negative logic) 1m sec or more
(2) Output Signals from Printer
l ACK : An 8 bit data request signal. Pulse signal output at the end of
the BUSY signal. (negative logic)
l BUSY : The signal to indicate BUSY state of the printer. Input new data for "LOW".
(positive logic)
l FAULT : The signal which is made "LOW" when the printer is in alarm state. All the
control circuits inside the printer are stopped at this time.(negative logic)
l PE : The signal which is output when paper runs out or goes scarce. (positive logic)
l Drawer Switch Output
: With the switch open, this signal goes "HIGH". When shorting, this goes
"LOW".
(3) Power supply
l +5 V DC : This is 5V pulled up by a 3.3k Ohm resistor.
l GND : This is the common ground for the circuit.