DP-300 Multiprotocol Fast Ethernet Print Server User’s Guide
Port Pinouts
10
B
4
P
ORT
P
INOUTS
This appendix shows the pinouts of the DP-300 parallel and serial printer ports.
Parallel Ports
The following table lists the pinouts of the print server’s 25-pin parallel port connector (identical
to the connector used on most personal computers), as well as the 36-pin Centronics connector
used on most printers.
Signal names beginning with
n
are active-low signals.
25-pin
Centronics
Signal
Source
1
1
nStrobe
Host
2
2
Data 1
Bi-directional
3
3
Data 2
Bi-directional
4
4
Data 3
Bi-directional
5
5
Data 4
Bi-directional
6
6
Data 5
Bi-directional
7
7
Data 6
Bi-directional
8
8
Data 7
Bi-directional
9
9
Data 8
Bi-directional
10
10
nAck
Printer
11
11
Busy
Printer
12
12
PError
Printer
13
13
Select
Printer
14
14
nAutoFd
Host
15
32
nFault
Printer
16
31
nInit
Host
17
36
nSelectIn
Host
18-25
16, 17, 19-30
Ground
