Pin No (D-Type 25)
Pin No (Centronics)
SPP Signal
Direction In/out
Register
Hardware Inverted
1
1
nStrobe
In/Out
Control
Yes
2
2
Data 0
Out
Data

3
3
Data 1
Out
Data

4
4
Data 2
Out
Data

5
5
Data 3
Out
Data

6
6
Data 4
Out
Data

7
7
Data 5
Out
Data

8
8
Data 6
Out
Data

9
9
Data 7
Out
Data

10
10
nAck
In
Status

11
11
Busy
In
Status
Yes
12
12
Paper-Out / Paper-End
In
Status

13
13
Select
In
Status

14
14
nAuto-Linefeed
In/Out
Control
Yes
15
32
nError / nFault
In
Status

16
31
nInitialize
In/Out
Control

17
36
nSelect-Printer / nSelect-In
In/Out
Control
Yes
18 - 25
19-30
Ground
Gnd