ATechnical Notes

Parallel port signal descriptions

Signal name

Pin #

Return

Signal

Description

 

 

pin

source

 

 

 

 

 

 

DSTRB-

1

19

Host

Pulsed low for .5

 

 

 

 

microseconds; clocks data

 

 

 

 

into printer

 

 

 

 

 

DATA1

2

20

Host

Positive true data input

 

 

 

 

 

DATA2

3

21

Host

Positive true data input

 

 

 

 

 

DATA3

4

22

Host

Positive true data input

 

 

 

 

 

DATA4

5

23

Host

Positive true data input

 

 

 

 

 

DATA5

6

24

Host

Positive true data input

 

 

 

 

 

DATA6

7

25

Host

Positive true data input

 

 

 

 

 

DATA7

8

26

Host

Positive true data input

 

 

 

 

 

DATA8

9

27

Host

Positive true data input

 

 

 

 

 

ACK-

10

28

Printer

Data acknowledge pulsed low

 

 

 

 

for 3-4 microseconds; ends

 

 

 

 

bus transaction

 

 

 

 

 

BUSY

11

29

Printer

Positive true = cannot accept

 

 

 

 

data

 

 

 

 

 

PE

12

-

Printer

Positive true = out of paper or

 

 

 

 

transfer roll

 

 

 

 

 

SLCT

13

-

Printer

Positive true = printer selected

 

 

 

 

 

INPRIME-

31

30

Host

Negative true = printer port

 

 

 

 

reset

 

 

 

 

 

FAULT-

32

-

Printer

Negative true = printer fault

 

 

 

 

indicator

 

 

 

 

 

Frame Gnd

-

17

Printer

Frame ground

 

 

 

 

 

SGnd

-

14,16,33

Printer

Signal ground

 

 

 

 

 

A-2Phaser 220i and Phaser 220e Color Printers

Page 104
Image 104
Tektronix 220i, 220e user manual Parallel port signal descriptions, Signal name Pin # Return Description Source