Information courtesy Telebyte,
Inc.
| Parallel
Port (Centronics 36) |
| The
Centronics® Parallel Interface is a 36 pin, byte-serial
control interface which has become a widely accepted
standard used in computer printer communications.
All logic levels for the Centronics® Parallel
Interface are TTL.
 |
| Pin |
Signal |
Pin |
Signal |
| 1 |
Data Strobe |
19 |
(R) Data Strobe |
| 2 |
Data Bit 1 |
20 |
(R) Data Bit 1 |
| 3 |
Data Bit 2 |
21 |
(R) Data Bit 2 |
| 4 |
Data Bit 3 |
22 |
(R) Data Bit 3 |
| 5 |
Data Bit 4 |
23 |
(R) Data Bit 4 |
| 6 |
Data Bit 5 |
24 |
(R) Data Bit 5 |
| 7 |
Data Bit 6 |
25 |
(R) Data Bit 6 |
| 8 |
Data Bit 7 |
26 |
(R) Data Bit 7 |
| 9 |
Data Bit 8 |
27 |
(R) Data Bit 8 |
| 10 |
Acknowledge |
28 |
(R) Acknowledge |
| 11 |
Busy |
29 |
(R) Busy |
| 12 |
Paper End |
30 |
(R) Paper End |
| 13 |
Select |
31 |
Input Prime |
| 14 |
Supply Ground |
32 |
Fault |
| 15 |
OSCXT |
33 |
Undefined |
| 16 |
Logic Ground |
34 |
Undefined |
| 17 |
Chassis Ground |
35 |
Undefined |
| 18 |
+5V |
36 |
Undefined |
| Parallel
Port (DB-25 Female) |
| 
|
| Pin |
Signal |
| 1 |
Data Strobe |
| 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 |
| 11 |
Busy |
| 12 |
Paper End |
| 13 |
Select |
| 14 |
+5V Pull
Up (10mA max) |
| 15 |
Unused |
| 16 |
Reset |
| 17 |
Ground |
| 18 |
Ground |
| 19 |
Ground |
| 20 |
Ground |
| 21 |
Ground |
| 22 |
Ground |
| 23 |
Ground |
| 24 |
Ground |
| 25 |
Ground |
|