LQ-570/1070

Input buffer capacity

The printer stores print data sent from your computer in its input buffer. Keep DIP switch 1-7 off to select an BKbyte buffer.

Skip-over-perforation

Turning DIP switch 1-8 on when you are using continuous paper enables the skipover-perforation function Use this function to leave a l-inch (25.~mm) margin between the last printable line on one page and the first printable line on the next page. This causes the printer to skip over the perforation between continuous sheets.

Most application programs take care of the top and bottom margins. Do not turn on skipover-perforation unless your program does not provide these margins.

Adjust your topof-form position with the MICRO FEED buttons to get half of the margin at the bottom of one page and half at the top of the next page.

Continuous paper page length

When you are printing on continuous paper, DIP switches 2-l and

2-2 let you select from the four page lengths described in DIP-switch Table 5.

Tear off

When you turn DIP switch 2-3 on, the tear-off feature is automatic when using continuous paper. The printer automatically advances the last printed page to the tear-off position. You can then easily tear off the printed paper.

The printer automatically returns the paper to the loading position when it receives more print data. You can also return the paper to the loading position by pressing the TEAR OFF button or the LOAD/EJECT button

Use the tear-off feature only with continuous paper loaded with the push tractor. Do not use the tear-off feature with the pull tractor.

Auto line feed

When auto line feed is on (DIP switch 2-4 on), the printer accompanies each carriage-return code (CR) received with a linefeed code (LF).

lf your printer is double spacing, turn DIP switch 2-4 off. If each line overprints the next, turn DIP switch 2-4 on

Interface Specifications

Your printer is equipped with a parallel interface.

Specifications and pin assignments

The built-in parallel interface has the following characteristics:

Datafbrmat:

Bbitp a r a l l e l

Synch7unization:

STROBE pulse

Handshake timing:

BUSY and

ACKNLG

signal

Signal level:

ITL compati%le level

Connector:

36pin 57-30360 (Amphenol) connector

 

or equivalent

Connector pin assignments and a description of their respective interface signals are shown in the following table.

 

Signal

 

’

Return

 

Signal

!

 

DIrectIon

 

 

 

 

 

 

DeSCrlplloll

 

 

 

 

 

 

Pin

)

 

Pln

 

 

c

 

 

 

 

 

 

1

i

19

 

 

STROBE

 

1IN

1

 

 

 

 

 

STROBE pulse to read data. Pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

width must be more than 0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mlcroseamds

at the recalvmg

~

 

 

 

 

20

 

 

 

 

 

 

 

cThesetermmal.slgnais

represent mformatlon

,

 

 

!6---i--Y

 

 

 

 

 

 

 

 

 

 

 

 

LOW when It IS logxal 0.

 

I

:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of the 1st to 8th bits of parallel data,

i

4

 

 

i:

 

 

 

 

 

 

 

 

 

 

 

 

respectively. Each slgnal IS at HIGH ,

5

 

 

23

 

 

 

 

 

 

 

 

 

 

 

 

 

level when data IS loglcal

1 and

 

 

 

!7

 

 

E

 

CATA 7

 

I IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lii---k

 

DATA8 /

 

 

IN

+About an 11-mlcrosewnd

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACKNLG

 

/

 

OUT

pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW mdlcates that data has been

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

/

 

 

 

 

 

received and that the prmter IS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

readv to accent more data.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

j

 

-HIGH slgnal mdlcates that the

I

11

29

 

 

BUSY

 

 

( OUT

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

printer cannot receive data. The

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signal goes HIGH In the followmg

 

i

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cases:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1) During data entry (ea. char. time) ;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2) During pnntmg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3) Ounng PAUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

c

4) During pnnter-error state

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A HIGH signal mdlcates that the

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

c

prmter IS out of paper.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pulled up to 5V through 3.3 Kohm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tWhen this signal IS LOW, the paper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IS automattcallv fed 1 lme atler

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pnntmg. (The ilgnal lzvel can be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

fixed to this by settmg DIP switch

 

 

 

t

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 to ON.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not

used

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logic

ground level.

 

J

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pnnter’s chassis ground, which IS

 

I

 

 

 

 

 

 

 

 

 

 

 

 

iisolated from the logic ground.

:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not used.

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Twlsted-oar

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

return sianal

around

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

l e v e l .

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When thts level becomes LOW, the I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

printer controller IS reset to Its

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

power-up slate and the pnnt buffer 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IS cleared. This level IS normally

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH; Its pulse width must be more 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

than 50 mlcroseconds at the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

recelvma terminal.

 

 

iI

 

 

 

 

 

 

 

 

 

 

 

 

t

 

 

 

 

 

This level becomes LOW when the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- printer 1s: 1) m paper out state, 2) In

 

j

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PAUSE state, 3) m error state

 

I

 

 

33

 

 

-

 

! GND

 

 

j-

 

 

I

Same as for Pms 1 Q-30

 

 

 

 

 

34

 

 

-

 

INC

 

 

I-

 

 

I Not used.

 

 

 

 

 

 

35

 

 

-

 

-

 

 

 

OUT

 

 

I

Pulled up to 5V through 3.3 Kohm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

 

 

-

 

 

SLCT IN

 

 

IN

 

 

’ The DCl/DCJ

cede IS valid only

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 when this slgnal IS HIGH This

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

, slgnal IS always LOW

 

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:

•The column heading “Direction” refers to the direction of signal flow as viewed from the printer.

•“Return” denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete the connection on the return side.

•All interface conditions are based on TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds.

•Data transfer must be carried out by observing the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the level of the BUSY signal is LOW.)

24-Pin Printers

LQ-570/1070-5