Technical Reference Guide
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - December 2000
5-15
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.
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.
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
