Citizen Systems iDP-562 User Manual download pdf (Page 22)

iDP-562 User’s Manual

CITIZEN

6. Parallel Interface

6.1 Description on Input / Output Signals

(a) Input signals to printer

O DATA 1 …. 8 bit parallel input Data Signal, Logic “1” represent HIGH level.

DATA 2

DATA 3

DATA 4

DATA 5

DATA 6

DATA 7

DATA 8

O STB ……. This is a strobe for reading-in the data signal. This signal is normally HIGH. The data signal

is clocked-in when STB is made LOW by the host computer.

(b) Output signals from printer

O ACK ……. The printer transmits this signal to the host computer after it has received and processed

input data and performed any function commands. This signal indicates that the printer is

ready to receive additional data or function codes. This signal is normally HIGH.

This is activated when signal is LOW. The printer will not transmit this signal when DC3

code is received under SELECT state.

O BUSY …… This is an output signal from the printer. When the printer is BUSY state, the signal is

HIGH.

O FAULT …. This is an output signal from the printer indicating printer FAULT state. The signal is LOW

during a ALARM state. Conditions of Alarm

(1) If home position is not detected within the stipulated period.

(2) If clock pulse is not detected within the stipulated period.

O SLCT …… This is an output signal from the printer indicating whether the printer is in a SELECT or

DESELECT state.

The signal is HIGH under the printer is ON-LINE state.

The signal is LOW under the printer is OFF-LINE state

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Citizen Systems iDP-562 User Manual Page 22