Citizen CBM-910 Manual do Utilizador descarregar pdf (Página 21)

CBM-910 User’s Manual

CITIZEN

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

T1 2.7µs MIN

T2 500mS MIN (When power is supplied)

T3 10µs TYP

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 59 60

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