Input And Output Signals; Electrical Characteristics - Citizen CBM-270 User Manual

6.3

Input and Output Signals

6.3.1 Input and Output Signals
(1) Input signals to the printer
DATA
STROBE
RESET
(2) Output signals from the printer
ACK
BUSY
FAULT
PE
(3) Power source and the related
+5 V DC
GND
6.3.2

Electrical Characteristics

: 8-bit parallel signal (Positive logic)
: Strobe signal to read the 8-bit data (Negative logic)
: Signal to reset the entire printer (Negative logic); 1 ms or more
: 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)
: 5 V output pulled up by a 10k resistor
: Common ground for the circuits
CBM-270 User's Manual