Hardware

Connector

3.6.225pol sub-min-D male

To connect the NetPorty II with the PC it is possible to use the Centronics (LPT) port directly or to use the adapter cable to use the RS232 (COM) port. In both cases the pinning of the 25pol sub-min-D male is the same.

Connector definition:

 

Pin

 

I/O

Usage

Description

 

 

 

1

 

Input

Parallel

Strobe

 

 

 

2

 

Input

Parallel

D0

 

 

 

3

 

Input

Parallel

D1

 

 

 

4

 

Input

Parallel

D2

 

 

 

5

 

Input

Parallel

D3

 

 

 

6

 

Input

Parallel

D4

 

 

 

7

 

Input

Parallel

D5

 

 

 

8

 

Input

Parallel

D6

 

 

 

9

 

Input

Parallel

D7

 

 

 

10

 

Output

Parallel

/acknlg

 

 

 

11

 

Output

Parallel

Busy

 

 

 

12

 

Output

Parallel

Paper empty

 

 

 

13

 

Output

Parallel

Slct

 

 

 

14

 

Input

Parallel

/autofd

 

 

 

15

 

Output

Parallel

/error

 

 

 

16

 

Input

Both

high -> RESET; low -> Operational

 

 

 

 

 

 

 

/init DTR (Porty RESET in): switch level 2.5V

 

 

 

 

 

 

 

input range -40..+40V, low speed 10ms

 

 

 

 

 

 

 

A weak pull-up and pull-down is necessary to

 

 

 

 

 

 

 

define with special mounting whether the

 

 

 

 

 

 

 

reset line is active or not if this line is not

 

 

 

 

 

 

 

connected.

 

 

 

17

 

Input

Parallel

/slct in

 

 

 

18

 

X

Both

Ground

 

 

 

19

 

Input

Serial

TX (PC -> Porty)

 

 

 

20

 

Output

Serial

RX (Porty -> PC)

 

 

 

21

 

Input

Serial

RTS

 

 

 

22

 

Output

Serial

CTS

 

 

 

23

 

Input

Serial

Free input (DTR)

 

 

 

24

 

Output

Serial

DSR

 

 

 

25

 

Input

Serial

Free input (as serial master it can be used as

 

 

 

 

 

 

 

CD or RI)

 

 

 

 

 

 

 

and also optional power input source

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Version 1.03

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 34
Image 34
Compaq NetPorty II manual 2 25pol sub-min-D male, Connector definition