Citizen CBM-270 user manual Input and Output Signals

·BUSY

·FAULT ·PE

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 signal to read the 8-bit data (Negative logic)
	STROBE
·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)

: Signal to indicate that the printer is busy. Input new data when it is "Low." (Positive logic)

: Turned to "Low" when the printer has an alarm. At this time, all the control circuits in the printer stop. (Negative logic)

: 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 10kW resistor
·GND	: Common ground for the circuits

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