Little Board P6d Module

Table 2-20. Parallel Port Connections (J9)

Pin #

Signal Name

Function

In/Out

DB25 Pin

 

 

 

 

 

1

STB*

Output Data Strobe

Out

1

 

 

 

 

 

3

PD 0

LSB Of Printer Data

I/O

2

 

 

 

 

 

5

PD 1

Printer Data 1

I/O

3

 

 

 

 

 

7

PD 2

Printer Data 2

I/O

4

 

 

 

 

 

9

PD 3

Printer Data 3

I/O

5

 

 

 

 

 

11

PD 4

Printer Data 4

I/O

6

 

 

 

 

 

13

PD 5

Printer Data 5

I/O

7

 

 

 

 

 

15

PD 6

Printer Data 6

I/O

8

 

 

 

 

 

17

PD 7

MSB Of Printer Data

I/O

9

 

 

 

 

 

19

ACK*

Character Accepted

In

10

 

 

 

 

 

21

BUSY

Cannot Receive Data

In

11

 

 

 

 

 

23

PE

Out of Paper

In

12

 

 

 

 

 

25

SLCT

Printer Selected

In

13

 

 

 

 

 

2

AUTOFD*

Autofeed

Out

14

 

 

 

 

 

4

ERROR

Printer Error

In

15

 

 

 

 

 

6

INIT*

Initialize Printer

Out

16

 

 

 

 

 

8

SELIN*

Selects Printer

Out

17

 

 

 

 

 

26

KEY

Key Pin

N/A

 

 

 

 

 

 

Note

For maximum reliability, keep the cable between the board and the device it drives to 10 feet or less in length.

IEEE-1284-compliant Cables

Using the parallel port for high-speed data transfer in ECP/EPP modes requires special cabling for maximum reliability.

Some of the parameters for a compliant IEEE-1284 cable assembly include: All signals are twisted pair with a signal and ground return

Each signal and ground return should have a characteristic unbalanced impedance of 62 +/- 6 ohms within a frequency band of 4 to 16MHz

The wire-to-wire crosstalk should be no greater than 10%

Please refer to the IEEE-1284 standard for the complete list of requirements for a compliant cable assembly, including recommended connectors

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Image 39
Ampro Corporation 5001451A manual IEEE-1284-compliant Cables, Pin # Signal Name Function In/Out DB25 Pin

5001451A specifications

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