User guide
Technical Characteristics
The following diagram illustrates the pins and corresponding signals on the
parallel interface connector.
19 GROUND
20 GROUND
21 GROUND
22 GROUND
23 GROUND
24 GROUND
25 GROUND
26 GROUND
27 GROUND
28 GROUND
29 GROUND
30 GROUND
31 INIT.
32 ERROR
33 LOGIC GROUND
34 NC
35 +5 V
36 INPUT / SELECT IN
NC 17
ACKNOWLEDGE 10
AUTOFEED XT 14
PAPER EMPTY 12
LOGIC GROUND 16
STROBE 01
DATA 1 03
DATA 2 04
DATA 3 05
DATA 4 06
DATA 5 07
DATA 6 08
DATA 7 09
BUSY 11
NC 15
+5 V 18
ON LINE 13
DATA 0 02
Connector pins and corresponding signals
The following table contains the signals exchanged by the printer and
computer, and their meanings, in standard Centronics mode.
PIN SIGNAL DIRECTION SIGNAL DESCRIPTION
1
To printer
STROBE
Signal, valid at logic level 0, used to transfer data to
the printer.
Pulse duration must be at least 0.5 ms.
2 - 9
To printer DATA 0 - 7
These 8 lines carry the data transmitted to the printer.
Signal duration must be stable at least 0.5 ms before
the falling edge of STROBE signal, and remain stable
at least 0.5 ms after its rising edge.
Data 7 is the most significant bit but is not used in 7-
bit ASCII mode
F-6