CBM-270 User’s Manual
6.3 Input and Output Signals
6.3.1 Input 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
6.3.2 Electrical Characteristics