Citizen CBM-910II Guida Utente

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POWER

DATA

STB

T1

DATA

DATA

DATA

T2

BUSY

ACK

T3

T1: 1.6 

µs MIN

T2: 500 

µS MIN

T3: 10 

µs TYP

T4: 5 

µs TYP

T5: 5 

µS TYP

(1)

Input signal
• DATA 1 to 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 4 ms 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)

• SELECT . . . Signal to indicate this equipment is in the SELECT (ready for

communication) state (positive logic)

“LO”is output in the state deselected by the operation panel (SEL-

SW), mechanical error, or memory error.

• P.N.E. . . . Signal to be output for paper-near-end

(3)

Other
• GND . . . Ground commonly used in the circuit
• FRAME GND . . . Frame ground (case ground)

(4)

Timing chart

Busy signal timing: Clear timing can be selected by the memory switch.
ACK signal timing: The following kinds of timing can be selected by the memory
switch setting.

BUSY

ACK

T4

BUSY

ACK

BUSY

Before

Center

After

ACK

T5