Technical Reference Guide

5.5.5 PARALLEL INTERFACE CONNECTOR

Figure 5-4 and Table 5-12 show the connector and pinout of the parallel interface connector. Note that some signals are redefined depending on the port’s operational mode.

13

12

11

10

9

8

7

6

5

4

3

2

1

25

24

23

22

21

 

20

19

18

17

16

15

14

Figure 5-4.Parallel Interface Connector (Female DB-25 as viewed from rear of chassis)

Table 5–12. DB-25 Parallel Connector Pinout

Table 5-12.

DB-25 Parallel Connector Pinout

Pin

Signal

Function

Pin

Signal

Function

1

STB-

Strobe / Write [1]

14

LF-

Line Feed [2]

2

D0

Data 0

15

ERR-

Error [3]

3

D1

Data 1

16

INIT-

Initialize Paper [4]

4

D2

Data 2

17

SLCTIN-

Select In / Address. Strobe [1]

5

D3

Data 3

18

GND

Ground

6

D4

Data 4

19

GND

Ground

7

D5

Data 5

20

GND

Ground

8

D6

Data 6

21

GND

Ground

9

D7

Data 7

22

GND

Ground

10

ACK-

Acknowledge / Interrupt [1]

23

GND

Ground

11

BSY

Busy / Wait [1]

24

GND

Ground

12

PE

Paper End / User defined [1]

25

GND

Ground

13

SLCT

Select / User defined [1]

--

--

--

NOTES:

[1]Standard and ECP mode function / EPP mode function

[2]EPP mode function: Data Strobe

ECP modes: Auto Feed or Host Acknowledge

[3]EPP mode: user defined

ECP modes:Fault or Peripheral Req.

[4]EPP mode: Reset

ECP modes: Initialize or Reverse Req.

Compaq Deskpro EXS and Workstation 300 Personal Computers 5-15

Featuring the Intel Pentium 4 Processor

First Edition - December 2000

Page 109
Image 109
Compaq 850 manual Parallel Interface Connector, DB-25 Parallel Connector Pinout, Pin Signal Function