Rohde & Schwarz CRTU-RU - Connectors for Peripherals; LPT Interface; Fig. 2-3 Pin Assignment of the LPT Connector

Hardware Interfaces CRTU-RU
1138.6990.12 2.6 E-2
Connectors for Peripherals
LPT Interface
1
14
13
25
D0
D1
D2
D3
D4
D5
D6
D7
ACK
BUSY
PE
SELECT
STROBE
AUTOFEED
ERROR
INIT
SELECT IN
GND
GND
GND
GND
GND
GND
GND
GND
Fig. 2-3 Pin assignment of the LPT connector
The 25-pin standard SUB-D female connector LPT on the rear panel of the CRTU-RU is intended for
connecting a printer. The interface is CENTRONICS compatible.
In GSM Mode this connector is also used for the dongle for hardlock software protection.
Pin Signal Input (I)
Output (O)
Description
1 STROBE O Impulse for transfer of a data byte, 1µs pulse width at
minimum (active LOW).
2 D0 O Data line 0
3 D1 O Data line 1
4 D2 O Data line 2
5 D3 O Data line 3
6 D4 O Data line 4
7 D5 O Data line 5
8 D6 O Data line 6
9 D7 O Data line 7
10 ACK I This indicates that the printer is ready to receive the next
byte (active LOW).
11 BUSY I Signal i active if the printer is unable to receive data
12 PE I The signal is activated if no printer paper is available
(active HIGH).
13 SELECT I The signal is activated when the printer is selected (active
HIGH).
14 AUTOFEED O If the signal is active the printer inserts a line feed after
each line (active LOW).
15 ERROR I The signal is activated if no printer paper is available or
an error occurred (active LOW).
16 INIT O Initializing the printer (active LOW).
17 SELECT IN O If the signal is active the codes DC1/DC3 are ignored by
the printer (active LOW).
18 - 25 GND Connected to ground.