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5.3
Description of Input/ Output Signals
(1) Input signal
* DATA 1...........8 bit parallel signal (positive logic)
* DATA 2...........8 bit parallel signal (positive logic)
* DATA 3...........8 bit parallel signal (positive logic)
* DATA 4...........8 bit parallel signal (positive logic)
* DATA 5...........8 bit parallel signal (positive logic)
* DATA 6...........8 bit parallel signal (positive logic)
* DATA 7...........8 bit parallel signal (positive logic)
* DATA 8...........8 bit parallel signal (positive logic)
* STB...............Strobe signal for reading out data (negative logic)
* RESET............Signal for resetting the entire unit (negative logic 4ms or more)
(2) Output signal
* ACK..............8 bit data signal for requesting data. ACK is issued at the end of the BUSY signal (negative logic)
* BUSY............Signal indicating the printer is busy. Input new data when the signal is in "LOW" condition.
(positive logic)
* HI-LEVEL......Connected to Vcc via 3.3 kΩ resistance.
(3) Timing chart
CITIZEN
T1
2.7µs MIN
T2
500mS MIN
T3
10µs TYP
(When power is supplied)
15
CBM-910 User's Manual
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