Citizen Systems CBM-270 user manual Input and Output Signals, Electrical Characteristics

CBM-270 User’s Manual

6.3Input and Output Signals

6.3.1Input and Output Signals

(1)Input signals to the printer

∙DATA		: 8-bit parallel signal (Positive logic)
∙
	STROBE	: Strobe signal to read the 8-bit data (Negative logic)
∙RESET		: Signal to reset the entire printer (Negative logic); 1 ms or more
(2) Output signals from the printer
∙ACK		: 8-bit data request signal. A pulse signal to be output at the end of the BUSY signal
		(Negative logic)
∙BUSY		: Signal to indicate that the printer is busy. Input new data when it is "Low." (Positive
		logic)
∙FAULT		: Turned to "Low" when the printer has an alarm. At this time, all the control circuits in
		the printer stop. (Negative logic)
∙PE		: Output if the printing paper has run out or is running out. (Positive logic)
(3) Power source and the related
∙+5 V DC		: 5 V output pulled up by a 10kΩ resistor
∙GND		: Common ground for the circuits

6.3.2Electrical Characteristics