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7. PARALLEL INTERFACE
7.1 Specifications
Data input system
Control signals
7.2 Input and Output Signals
DATA0 7
STROBE
RESET
ACK
BUSY
FAULT
PE
7.3 Electrical Characteristics
(1) Input signal levels
"HIGH" level
"LOW" level
(2) Output signal levels
"HIGH" level
"LOW" level
(3) Input/output conditions
The STROBE and RESET input signals are all pulled up at 3.3k .
[Printer Side]
All the output signals are pulled up at 50k .
: 8-bit parallel system(DATA0 7)
: ACK, BUSY, STROBE, FAULT, PE, RESET
: An 8-bit parallel signal.(Positive logic)
: A strobe signal to read the 8-bit data.(Negative logic)
: A signal to reset the entire control board.(Negative logic)
: An 8-bit data request signal.
A pulse signal to be output at the end of the BUSY signal.(Negative logic)
: A signal to indicate the BUSY status. Input new data when "LOW."
(Positive logic)
: A signal turned to "LOW" in case of the alarm status.(Negative logic)
: A signal to be output when the printing paper runs out.(Positive logic)
: 0.7Vcc at minimum
: 0.3Vcc at maximum
: Vcc-0.1V at minimum
: 0.1V at maximum
[Host Side]
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CBM-292/293 User's Manual
The others are pulled up at 50k .
CITIZEN
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