Parallel interface, Communication modes, Interface signals – TA Triumph-Adler CLP 4532 User Manual
Page 109: Parallel interface -3
Computer Interface
4-3
Parallel Interface
Communication Modes
The printer provides high-speed data transmission on a parallel interface. You can select the parallel
interface communication mode from the operation panel. To change the communication mode, refer
to Changing Parallel Interface Mode on page 2-24.
NOTE:
Use a parallel interface cable that complies with the IEEE 1284 standard.
You can choose from four communication modes:
Interface Signals
Table shows the connector pins and corresponding input and output signals of the parallel interface.
Explanation of each signal is also given in the table.
The description in [ ] indicates signal names in Auto mode and Nibble (high) mode (IEEE
1284-compliant). In Auto and Nibble modes, these signals are bidirectional.
Communication Mode
Reception
Transmission
Auto (default)
High-speed/ECP
Nibble/ECP
Nibble
High-speed
Nibble
High-speed
High-speed
—
Normal
Normal
—
Pin
In or out
Signal
Description
1
In
Strobe* [nStrobe]
A negative-going-strobe pulse causes the printer to
read and latch the data on the Data 0 [1] to Data 7
[8] signal lines.
2
In
Data 0 [Data 1]
These eight signals form one byte of data sent from
a host computer to the printer. Data 7 [8] is the most
significant bit.
3
In
Data 1 [Data 2]
4
In
Data 2 [Data 3]
5
In
Data 3 [Data 4]
6
In
Data 4 [Data 5]
7
In
Data 5 [Data 6]
8
In
Data 6 [Data 7]
9
In
Data 7 [Data 8]
10
Out
Acknowledge* [nAck]
This negative-going pulse acknowledges the
previous character received.
11
Out
Busy [Busy]
When this signal is high, the printer is busy. When it
is low, the printer is able to receive more data.
12
Out
Paper Empty [PError]
This signal goes high when the printer runs out of
paper. **
13
Out
Online (Select) [Select] This signal goes high when the printer is online and
low when the printer is offline. The signal goes low
when you press [GO] to make the printer go off
line. **
14
In
— [nAutoFd]
Ignored
15
—
—
Not used
16
—
0 V DC
17
—
Chassis Ground