Technical data

Block Diagram
A-5
DIGITAL Server 3220/3220R
Parallel Interface
The parallel interface is implemented on the main logic board and is accessible
through the rear panel 25-pin f D-sub connector. This LPT port is an
AT
and
Centronics
compatible bi-directional parallel port. The user can select the printer port
to be set to either a PS/2 type bi-directional parallel port compatible mode or
extended parallel port (EPP/ECP) bi-directional mode. The table below lists the
parallel interface pin assignments. L denotes low true logic.
Parallel Interface Pin Assignments
Pin Number Function
1 Strobe L
2 Data Bit 0
3 Data Bit 1
4 Data Bit 2
5 Data Bit 3
6 Data Bit 4
7 Data Bit 5
8 Data Bit 6
9 Data Bit 7
10 Acknowledge L
11 Busy L
12 Paper End
13 Select
14 Auto Feed L
15 Error L
16 Initialize L
17 Select In L
18-25 Ground