Keyboard Connector Pin Assignments

Pin no.

Signal name

Direction

Description

1

KBD CLK

I/O

Keyboard clock

2

KBD DATA

l/O

Keyboard data

3

-KBD RESET

O

-Keyboard reset

4

GND

Ground

5

+5V

Power

6-8

NC

No connection

Parallel Port Loop-back Connector Pin Assignments

Signal

name

Pin no.

 

Pin no.

Signal name

Strobe

 

1

13

Select

Data bit 0

2

15

Error

Auto feed

14

12

P.END (out of paper)

Init. printer

16

10

Acknowledge

Select

input

17

11

Busy

(Output

signal)

 

 

 

(Input signal)

Serial Port Loop-back Connector Pin Assignments

Signal name

Pin no.

 

 

Pin no.

Signal name

Transmit data

2

 

3

Receive data

Request to send

4

 

5

Clear to send

Data terminal ready

20

 

6

Data set ready

(Output signal)

 

 

 

 

(Input signal)

Specifications B-9