Electrical Characteristics - Citizen CBM-1000 User Manual

6.2.2 Electrical Characteristics

Input signal level (nStrobe, DATA 0-7)
All the input signals are at the C-MOS level.
"HIGH" level: 4.0 V minimum
"LOW" level: 0.9 V maximum
Output signal level
All the output signals are at the C-MOS level.
"HIGH" level: 2.4 V minimum
"LOW" level: 0.4 V maximum
Input and output conditions
All the input signals, DATA 0-7, are each pulled up with 50 k resistor, and the
other input signals are each pulled up with a 3.3 k resistor.
[Printer Side]
All the output signals, DATA 0-7, are each pulled up with a 50 k resistor, and the
other output signals are each pulled up with a 3.3 k resistor.
[Printer Side]
Vcc
Twisted Pair Wire
Vcc
Twisted Pair Wire
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[Host Side]
[Host Side]