Signal

Return

 

 

 

Pin

Pin

Signal

Direction

Deccriptlon

 

 

 

 

 

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 printlng

 

 

 

 

3) When the Pause button is

 

 

 

 

pressed

 

 

 

 

4) During an errar state

 

 

 

 

 

12

30

PE

OUT

A HIGH signal indicates that

 

 

 

 

the printer is out of paper.

 

 

 

 

 

13

-

SLCT

OUT

Pulled up to 5 V through

 

 

 

 

1 .O kQ resistance

 

 

 

 

 

14

-

AUTO

IN

When this signal is LOW, the

 

 

FEED

 

paper b automatically fed

 

 

E

 

one line after printing.

 

 

 

 

 

15

-

NC

 

Not used

 

 

 

 

 

16

-

GND

 

Logic ground level

 

 

 

 

 

17

-

CHASSIS

-

Printer’s chassis ground,

 

 

GND

 

which is isolated from the

 

 

 

 

logic ground

 

 

 

 

 

18

-

NC

 

Not used

 

 

 

 

 

19-30

-

GND

 

Twisted-pair return signal

 

 

 

 

ground level

 

 

 

 

 

31

16

KiT

IN

When this level becomes

 

 

 

 

LOW, the printer controller is

 

 

 

 

reset to its state when the

 

 

 

 

power ls first turned on and

 

 

 

 

the print buffer Is cleared.

 

 

 

 

This level& normally HIGH; Its

 

 

 

 

pulse width must be more

 

 

 

 

than 50 us at the receiving

 

 

 

 

terminal.

 

 

 

 

 

Appendix A-9