Signal

Return

 

 

 

 

 

 

 

 

 

pin

pin

Signal

Direction

Description

 

 

 

 

 

 

 

 

 

 

 

11

29

 

 

BUSY

OUT

A HIGH signal indicates the

 

 

 

 

 

 

 

 

 

 

printer cannot receive data.

 

 

 

 

 

 

 

 

 

 

The signal goes HIGH in the

 

 

 

 

 

 

 

 

 

 

following cases:

 

 

 

 

 

 

 

 

 

 

1) During data entry

 

 

 

 

 

 

 

 

 

 

(for each character)

 

 

 

 

 

 

 

 

 

 

2) During initialization

 

 

 

 

 

 

 

 

 

 

3) During self test and

 

 

 

 

 

 

 

 

 

 

default-setting printing

 

 

 

 

 

 

 

 

 

 

4) During a printer-error state

 

 

 

 

 

 

 

 

 

 

 

12

30

 

 

 

PE

OUT

A HIGH signal indicates the

 

 

 

 

 

 

 

 

 

 

printer is in a paper-out state

 

 

 

 

 

 

 

 

 

 

or in an error state

 

 

 

 

 

 

 

 

 

 

 

13

-

 

 

SLCT

OUT

Pulled up to +5 V through

 

 

 

 

 

 

 

 

 

 

1 kΩ resistance

 

 

 

 

 

 

 

 

 

 

 

14

-

 

 

 

 

 

 

IN

When this signal is LOW, the

 

 

AUTO

 

 

 

 

 

 

FEED

 

paper is automatically fed

 

 

 

 

 

XT

 

one line after printing

 

 

 

 

 

 

 

 

 

 

 

15

-

 

 

 

NC

-

Not used

 

 

 

 

 

 

 

 

 

 

 

16

-

 

 

GND

-

Logic ground level

 

 

 

 

 

 

 

 

 

 

 

17

-

CHASSIS

-

Printer’s chassis ground,

 

 

 

 

GND

 

which is connected to the

 

 

 

 

 

 

 

 

 

 

logic ground

 

 

 

 

 

 

 

 

 

 

 

18

-

 

 

 

NC

-

Not used

 

 

 

 

 

 

 

 

 

 

 

19-30

-

 

 

GND

-

Twisted-pair return signal

 

 

 

 

 

 

 

 

 

 

ground level

 

 

 

 

 

 

 

 

 

 

 

31

16

 

 

 

 

 

 

 

 

 

 

 

INIT

IN

When this signal goes LOW,

 

 

 

 

 

 

 

 

 

 

the printer controller is reset

 

 

 

 

 

 

 

 

 

 

to its state when the power is

 

 

 

 

 

 

 

 

 

 

first turned on and the print

 

 

 

 

 

 

 

 

 

 

buffer is cleared. This level is

 

 

 

 

 

 

 

 

 

 

normally HIGH; its pulse width

 

 

 

 

 

 

 

 

 

 

must be more than 50 μs at

 

 

 

 

 

 

 

 

 

 

the receiving terminal.

 

 

 

 

 

 

 

 

 

 

 

32

-

 

 

OUT

This signal level goes LOW

 

ERROR

 

 

 

 

 

 

 

 

 

 

 

when the printer:

 

 

 

 

 

 

 

 

 

 

1) Is out of paper

 

 

 

 

 

 

 

 

 

 

2) Is in an error state

 

 

 

 

 

 

 

 

 

 

3) Has no ink cartridges

 

 

 

 

 

 

 

 

 

 

installed

 

 

 

 

 

 

 

 

 

 

 

B-10Technical Specifications