User`s guide

2-4 Installation and Configuration
Centronics Parallel Pinout Information
Figure 2-2. Centronics Parallel Interface Connector
1. Active low.
Table 2-2. Centronics Parallel Interface Pinout Information
Pin
Number Pin ID Description
1 Strobe
1
A low pulse causes the printer to read one byte of data.
2 - 9 Data 0 - Data 7 These pins are the data lines. Data 0 is the least significant bit (LSB).
10 Acknowledge
1
The printer sends a low pulse to indicate that it has accepted a byte of data and is ready
for more data.
11 Busy The printer sends a high logic level to indicate to the computer that it cannot receive data
due to data entry, a full buffer, or error status.
12 Paper Error The printer sends a high logic level to indicate to the computer that it is out of paper.
13 Ready The printer sends a high logic level to indicate to the computer that it is in an online
condition. The printer sends a low logic level to indicate that it is offline or that the input
buffer is full.
16 Signal Ground Signal interface ground.
17 Chassis Ground Chassis ground.
18 +5 V The printer outputs a +5 volt high logic level through a 2.2K ohm resistor.
19 - 30 Ground These pins are tied to signal ground.
31 Reset/Input Clear
1
A low pulse sent by the computer resets the printer and clears the print buffer. The reset
occurs on the trailing edge of the pulse.
32 Error
1
The printer sends a low logic level to the computer to indicate that it is in an error state.
181716151413121110987654321
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
Ground
Strobe (STR)
Data 0
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 1
Acknowledge (ACK)
Busy
Paper Error (PE)
Ready
Signal Ground
Chassis Ground
+5V
Error (ERR)
Reset/Input Clear