Parallel Interface (Centronics Type)



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 Chasis Ground 35 Undefined
18 +5V 36 Undefined