Centronics Interfaces
Programmer Reference Guide U26169-J-Z716-1-7600
© Siemens Nixdorf Informationssysteme AG 1995 Pfad: D:\SNI\Mackwitz\u26169\o26169e\26169e.k11
Parallel Centronics interface
Pin assignment
Pin Signal
name Explanation Direction
from/to printer
1 STROBE When the signal is set to logical zero, the
data byte DATA 1 - DATA 8 is stored in the
printer buffer.
x
2
3
4
5
6
7
8
9
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
Data line LSB
Data line
Data line
Data line
Data line
Data line
Data line
Data line MSB
x
x
x
x
x
x
x
x
10 ACKN The printer indicates that it has received a
character or a control character and that it is
ready to receive another character by
setting this signal to zero.
x
11 BUSY The printer cannot accept further data when
this signal is 1. x
12 PE Is set to 1 under the following conditions:
– No paper
– Paper out
– Paper jam
x
13 SELECT This signal i s always one. It indicates that
the printer is always online and ready. x
31 INIT When this signal goes to zero, the ACKN
signal of the printer is set to one. x
32 FAULT This signal is always one. It only goes to
zero when the printer is turned off. x