Citizen Systems CBM-231 manual Input / Output Signals 6.3.1 Input / Output Signals, Data

CBM-230/231 User’s Manual

6.3Input / Output Signals 6.3.1 Input / Output Signals

(1) Input signals to the printer

• DATA		: This is an 8-bit parallel signal (Positive logic)
•		: This is a strobe signal to read in 8 -bit data (Negative logic)
	STB
•
	RESET	: This signal resets the entire printer (Negative logic) 1 ms or more
(2) Output signals from the printer
•
	ACK	: This is an 8-bit data request signal. Pulse signal output at the end of the BUSY signal
		(Negative logic)
• BUSY		: This signal indicates the BUSY state of the printer. Enter new data when it is at LOW.
		(Positive logic)
•		: This signal is set to low when the printer has an alarm. When this is done, all control
	FAULT
		circuits in the printer stop.(Negative logic)
• PE		: This signal is output when the printing paper has run out or is running out.
		(Positive logic)

•Drawer switch output

:This signal is set to HIGH when the switch is opened, and to LOW when shorted.

(3)Power signals

• +5VDC	: This is a 5 V output pulled up at a 3.3 k Ω resistor.
• GND	: This is a common ground on the circuits.

17 CITIZEN