Epson LX-86TM Especificações descarregar pdf (Página 12)

REV.-A

Table 1-2 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Table 1-2. Connector Pin Assignments and Signal Functions

~in

No.

Signal Name

Return Pin No.

DIR

Functional Description

STROBE

Strobe pulse to read the input data. Pulse width

must

be more than

0.51Js.

Input data is latched after

falling edge of this signal.

DATA 1

Parallel input data to the printer.

DATA2

“HIGH” level means data “ 1“.

DATA3

“LOW” level means data “O”.

DATA4

DATA5

DATA6

DATA7

DATA8

ACKNLG

out

This pulse indicates data are received and the

printer is ready to accept next data.

Pulse width is approx. 12

KS.

BUSY

out

HIGH indicates printer can not accept next data.

out

HIGH indicates paper-out. This signal is effective

only when

ERROR

signal is

“LOW”.

SLCT

—

out

Always

“HIGH” output. (Pulled up to

+5V

through

3.3 K ohms register.)

AUTOFEED-XT

—

If the signal is “LOW” when the printer is initialized,

a line feed is automatically performed by input of

“CR” code. (Auto LF)

—

— —

Not used.

GND

—

Ground for twisted-pair grounding.

Chassis

GND

— —

Chassis ground level of printer

—

— —

Not used.

9 to 30

GND

— —

Ground for twisted-pair grounding.

I NIT

Pulse (width:

50MS

min., active “LOW”) input for

printer initialization.

ERROR

—

out

LOW indicates that some error has occurred in the

printer.

GND

—

Ground for twisted-pair grounding

—

Not used.

—

out

Always “HIGH”. (Pulled up to

+5V

through a

3.3k-ohm register.)

SLCT-IN

—

If the signal is “LOW” when printer is initialized, the

DC l/DC3 control is disabled.

1-4

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 141 142

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