Parallel Interface (Lpt) - ADLINK Technology CoreModule 430 Reference Manual

Chapter 3

Parallel Interface (LPT)

The Vortex x86 processor chip provides the Parallel Port interface. The Parallel Port supports the standard
parallel, Bi-directional, Standard Printer Port (SPP), Enhanced Parallel Port (EPP), and Enhanced
Capabilities Port (ECP) protocols.
Table 3-5 describes the pin signals of the Parallel interface, which uses a 26-pin, right-angle header with 2
rows, odd/even sequence (1, 2), and 0.079" (2mm) pitch.
Table 3-5. Parallel (LPT) Interface Pin/Signal Descriptions (J4)
Pin # Signal
1 Strobe*
2 AutoFD*
3 PD0
4 ERR*
5 PD1
6 INIT*
7 PD2
8 SLIN
9 PD3
10 GND
11 PD4
12 GND
13 PD5
14 GND
15 PD6
16 GND
17 PD7
18 GND
19 Ack*
20 GND
21 Busy*
22 GND
23 PE
24 GND
25 Slct
26 Key/NC
Note: The shaded table cells denote power or ground. The * symbol indicates the signal is Active Low.
20
Description
Strobe* – This is an output signal used to strobe data into the printer. I/O pin in
ECP/EPP mode.
Auto Feed* – This is a request signal into the printer to automatically feed one
line after each line is printed.
Parallel Port Data 0 – These pins (0 to 7) provides parallel port data signals.
Error – This is a status output signal from the printer. A Low State indicates an
error condition on the printer.
Parallel Port Data 1 – Refer to pin-3, PDO for more information.
Initialize* – This signal is used to Initialize printer. Output in standard mode,
I/O in ECP/EPP mode.
Parallel Port Data 2 – Refer to pin-3, PDO for more information.
Select In – This output signal is used to select the printer. I/O pin in ECP/EPP
mode.
Parallel Port Data 3 – Refer to pin-3, PDO for more information.
Ground
Parallel Port Data 4 – Refer to pin-3, PDO for more information.
Ground
Parallel Port Data 5 – Refer to pin-3, PDO for more information.
Ground
Parallel Port Data 6 – Refer to pin-3, PDO for more information.
Ground
Parallel Port Data 7 – Refer to pin-3, PDO for more information.
Ground
Acknowledge* – This is a status output signal from the printer. A Low State
indicates it has received the data and is ready to accept new data.
Ground
Busy* – This is a Status output signal from the printer. A High State indicates
the printer is not ready to accept data.
Ground
Paper End – This is a status output signal from the printer. A High State
indicates it is out of paper.
Ground
Select – This is a status output signal from the printer. A High State indicates it
is selected and powered on.
Key Pin/Not Connected
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