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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.

GND Ground

11 PD4 Parallel Port Data 4 – Refer to pin-3, PDO for more information.

GND Ground

13 PD5 Parallel Port Data 5 – Refer to pin-3, PDO for more information.

GND Ground

15 PD6 Parallel Port Data 6 – Refer to pin-3, PDO for more information.

GND Ground

17 PD7 Parallel Port Data 7 – Refer to pin-3, PDO for more information.

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.

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.

GND Ground

23 PE Paper End – This is a status output signal from the printer. A High State

indicates it is out of paper.

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

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 55 56

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