Appendix B • Specifications

 

 

 

 

 

 

 

 

 

Centronics Parallel Pin Assignments

 

 

 

 

 

 

 

 

Pin

Signal

Direction

Description

 

 

1

Strobe

In

A low pulse greater than 1µs causes the

 

 

 

 

 

printer to read one byte of data.

 

 

 

 

 

 

 

 

 

2

DATA0

In

Data Bit 0

 

 

3

DATA1

In

Data Bit 1

 

 

4

DATA2

In

Data Bit 2

 

 

5

DATA3

In

Data Bit 3

 

 

6

DATA4

In

Data Bit 4

 

 

7

DATA5

In

Data Bit 5

 

 

8

DATA6

In

Data Bit 6

 

 

9

DATA7

In

Data Bit 7

 

 

 

 

 

 

 

 

 

10

Acknlg

Out

The printer sends a low pulse to indicate

 

 

 

 

 

that it has accepted a byte of data and

 

 

 

 

 

is ready for more data.

 

 

11

Busy

Out

The printer sends a high logic level to

 

 

 

 

 

indicate to the host that it cannot receive

 

 

 

 

 

data due to data entry, a full buffer or

 

 

 

 

 

error condition.

 

 

12

Paper Error

Out

The printer sends a high logic level to

 

 

 

 

 

indicate to the host that it is out of paper.

 

 

13

On Line

Out

The printer sends a high logic level to

 

 

 

 

 

indicate to the host that it is on line.

 

 

14, 15

 

 

Not Used

 

 

 

 

 

 

 

 

 

16

Sig Gnd

 

 

 

 

 

17

Chassis

 

 

 

 

 

 

Gnd

 

 

 

 

 

18

HI

Out

The printer outputs a high logic level

 

 

 

 

 

(+5V through a 2.2K ohm resistor) on this

 

 

 

 

 

pin when it is turned on.

 

 

 

 

 

 

 

 

 

19-30

Sig Gnd

In

 

 

 

 

 

 

 

 

 

 

31

Reset/Input

 

A low pulse greater than 10µs sent by the

 

 

 

 

 

host that resets the printer and clears the

 

 

 

 

 

print buffer.

 

 

 

 

 

NOTE: The printer may not work when

 

 

 

 

 

this line is held low.

 

 

 

 

 

 

 

 

32

Error

Out

The printer sends a low logic level to the

 

 

 

 

 

host to indicate that it is in an error state;

 

 

 

 

 

self test failed or carriage position lost.

 

 

 

 

 

 

 

 

DA300 Printer Operator Guide

B-3

Page 106
Image 106
Pitney Bowes DA300 manual Appendix B Specifications