Electrical Characteristics - Citizen CBM-270 User Manual

(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

(1) Input signal level
All the input signals are at the TTL level.
High level --- 2.0 V at minimum
Low level --- 0.8 V at maximum
(2) Output signal level
All the output signals are at the TTL level.
High level --- 2.4 V at minimum
Low level --- 0.4 V at maximum
(3) Input and output conditions
The STROBE and RESET input signals are pulled up at 10kΩ, and the other input signals at 50kΩ,
respectively.
[Printer Side]
All the output signals are pulled up at 50kΩ.
[Printer Side]
: 8-bit data request 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.
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 10kΩ resistor
: Common ground for the circuits
A pulse signal to be output at the end of the BUSY signal
[Host Side]
[Host Side]
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CBM-270 User's Manual
At this time, all the control circuits in
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