Centronics Parallel Host Interface

The Centronics Parallel host interface uses the signal definitions defined below.

Table 6-9. Centronics Parallel Signal Definitions

Pin

Signal

Function

Name

 

 

 

 

 

1

DS

Data strobe (active low)

 

 

 

2

DB0

Data bit 0

 

 

 

3

DB1

Data bit 1

 

 

 

4

DB2

Data bit 2

 

 

 

5

DB3

Data bit 3

 

 

 

6

DB4

Data bit 4

 

 

 

7

DB5

Data bit 5

 

 

 

8

DB6

Data bit 6

 

 

 

9

DB7

Data bit 7

 

 

 

10

ACK

Acknowledge (active low)

 

 

 

11

BSY

Busy (active high)

 

 

 

12

PE

Paper empty (active high)

 

 

 

13

SEL

Select (active high)

 

 

 

14

AF

Auto feed

 

 

 

15

 

Not used

 

 

 

16

SG

Signal ground

 

 

 

17

FG

Frame or chassis ground

 

 

 

18

PLH

Peripheral logic high

 

 

 

19 to 30

 

Signal ground

 

 

 

31

IP

INIT

 

 

 

32

ERR

Error (active low)

 

 

 

33 to 35

 

Not used

 

 

 

36

SI

Select input

 

 

 

Wiring Diagrams and Electrical Data

6-27