Signal

Return

Signal

Parallel

Direction

Description

Pin

Pin

 

Cable

 

 

 

 

 

Pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

-

NC

 

 

Not used

19-30

-

GND

21-24

 

Twisted pair ground

 

 

 

 

 

returns listed above

 

 

 

 

 

 

31

 

INIT

16

IN

Defined to reset and

 

 

 

 

 

dear the printer

 

 

 

 

 

when LOW: THE RE-

 

 

 

 

 

SET AND CLEAR

 

 

 

 

 

ARE NOT SUP-

 

 

 

 

 

PORTED BY THE

 

 

 

 

 

C82315*, As the IBM

 

 

 

 

 

host cannot be in-

 

 

 

 

 

terrupted by this

 

 

 

 

 

signal. An ACKNLG

 

 

 

 

 

is generated for

 

 

 

 

 

handshaking.

 

 

 

 

 

 

32

-

ERROR

15

OUT

This signal goes

 

 

 

 

 

LOW when the

 

 

 

 

 

printer is in an error

 

 

 

 

 

state such as out Of

 

 

 

 

 

p a p e r .

 

 

 

 

 

 

33

-

GND

25

 

Logic ground

 

 

 

 

 

 

34

-

NC

 

 

Not used

35

-

HIGH

 

 

Pulled up to +5v

 

 

 

 

 

through a 3.3K ohm

 

 

 

 

 

resistance

 

 

 

 

 

 

36

-

SLCTIN

17

 

NOT SUPPORTED

 

 

 

 

 

 

NOTE:

The parallel connector is a DDK type DHA-36 or equivalent.

The column heading ‘DIRECTION’ refers to the direction of signal flow as viewed from the C82315* interface.

‘RETURN’ denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring. be sure to use twisted-pair cable for each signal and to complete the connection on the return side. The cable should be shielded and connected to the chassis of the host computer and printer.

All interface conditions as based on TTL levels. Both the rise and the fall times of each signal must be less than 0.2 u sec.

28