ADLINK Technology CoreModule 430, Reference Manual

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Chapter 3 Hardware
20 Reference Manual CoreModule 430
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.
Note: The shaded table cells denote power or ground. The * symbol indicates the signal is Active Low.
Table 3-5. Parallel (LPT) Interface Pin/Signal Descriptions (J4)
Pin # Signal Description
1 Strobe* Strobe* – This is an output signal used to strobe data into the printer. I/O pin in
ECP/EPP mode.
2 AutoFD* Auto Feed* – This is a request signal into the printer to automatically feed one
line after each line is printed.
3 PD0 Parallel Port Data 0 – These pins (0 to 7) provides parallel port data signals.
4 ERR* Error – This is a status output signal from the printer. A Low State indicates an
error condition on the printer.
5 PD1 Parallel Port Data 1 – Refer to pin-3, PDO for more information.
6 INIT* Initialize* – This signal is used to Initialize printer. Output in standard mode,
I/O in ECP/EPP mode.
7 PD2 Parallel Port Data 2 – Refer to pin-3, PDO for more information.
8 SLIN Select In – This output signal is used to select the printer. I/O pin in ECP/EPP
mode.
9 PD3 Parallel Port Data 3 – Refer to pin-3, PDO for more information.
10 GND Ground
11 PD4 Parallel Port Data 4 – Refer to pin-3, PDO for more information.
12 GND Ground
13 PD5 Parallel Port Data 5 – Refer to pin-3, PDO for more information.
14 GND Ground
15 PD6 Parallel Port Data 6 – Refer to pin-3, PDO for more information.
16 GND Ground
17 PD7 Parallel Port Data 7 – Refer to pin-3, PDO for more information.
18 GND Ground
19 Ack* 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.
20 GND Ground
21 Busy* Busy* – This is a Status output signal from the printer. A High State indicates
the printer is not ready to accept data.
22 GND Ground
23 PE Paper End – This is a status output signal from the printer. A High State
indicates it is out of paper.
24 GND Ground
25 Slct Select – This is a status output signal from the printer. A High State indicates it
is selected and powered on.
26 Key/NC Key Pin/Not Connected