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Input buffer capacity

The printer stores print data sent from your computer in its input

buffer. Keep DIP switch l-7 off to select an 8Kbyte buffer.

Skip-over-perforation

Turning DIP switch l-8 on when you are using continuous paper

enables the skip-over-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 skip-over-perforation unless your program does not

provide these margins.

Adjust your top-of-form position with the MICRO

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 2-1 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

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).

If your printer is double spacing, turn DIP switch 2-4 off. If each line

overprints the next, turn DIP switch 24 on

Interface Specifications

Your printer is equipped with a parallel interface.

Specifications and pin assignments

The built-in parallel interface has the following characteristics:

p a r a l l e l

STROBE pulse

Synchronization:

Handshake timing:

BUSY and m signal

Signal led:

or equivalent

24-Pin Printers

FEED buttons

to get

OFF

LOAD/EJECT

button or the

Connector pin assignments and a description of their respective

interface signals are shown in the following table.

Dlrectkn

DATA DATA 2 1

DATA 3

DATA 4

DATA 5

DATA 6

DATA DATA 8 7

ACKNLG

BUSY

OUT

SLCT

OUT

ERROR

OUT

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

only after receipt of the ACKNLG signal or when the level of

the BUSY signal is LOW.)

LQ-1070+

STROBE pulse to read data. Pulse-

width must be more than 0.5

microseconds at the recervrng

terminal.

These signals represent informatron

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

respectively. Each signal is at HIGH

level when data is logical 1 and

LOW when it is logical 0.

About an 11 -microsecond pulse.

LOW indicates that data has been

received and that the printer is

readv to acted more data.

HIGH signal indicates that the

printer cannot receive data. The

signal goes HIGH in the followrng

cases:

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

2) During printing

3) During PAUSE

4) During printer-error state

A HIGH sianal indicates that the

printer is &t of paper.

Pulled up to 5V through 3.3 Kohm

resistance.

When this signal is LOW, the paper

is automatically fed 1 line after

printing. (The signal level can be

fixed to this by settrng DIP switch

2-4 to ON.)

Not used.

Logic ground level.

Printer's chassis ground, which is -

isolated from the logic ground.

Not used.

Twisted-pair return signal ground -

level.

When this level becomes LOW, the

printer controller is reset to its

state

and the onnt buffer

HIGH; its pulse width must be more

than 50 microseconds at the

receiving terminal.

This level becomes LOW when the-

printer is: 1) in paper out state, 2) in

PAUSE state, 3) in error state

Same as for Pins 19-30.

Not used.

Pulled up to 5V through 3.3 Kohm

The DCl/DC3 code is valid only

when this signal is HIGH. This

signal is always LOW.

printer can be

carried out