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Stylus Pro XL+
Инструкция по эксплуатации Страница: 550

Epson Stylus Pro XL+ [550/573] Note the values may vary from printer to printer see the user s guide of your printer

Epson Stylus Pro XL [550/573] Note the values may vary from printer to printer see the user s guide of your printer

A-32 Parallel Interface

Pins and signals (continued)

Signal Pin Return Pin Signal Direction Description

15 — NC — Not used.

16 — GND — Logic ground level.

17 — CHASSIS

GND

— Printer’s chassis ground, which is isolated

from the logic ground.

18 — NC — Not used.

19–30 — GND — Twisted-pair return signal ground level.

31 16

INIT

IN When this level becomes LOW, the printer

controller is reset to its power-up state and

the print buffer is cleared. This level is

normally HIGH; its pulse width must be

more than 50 microseconds at the receiving

terminal.

32 —

ERROR

OUT This level becomes LOW when the printer

is:

1) In paper out state.

2) In error state.

33 — GND — Same as for Pins 19-30.

34 — NC — Not used.

35 — — OUT

Pulled up to 5V through 3.3 kΩ resistance.

36 —

SLCT IN

or

NC

IN

or

—

The DC1/DC3 code is valid only when this

SLCT IN signal is HIGH. (Internal fixing

can be carried out with the jumper switch.

The level of this signal is factory-set to

LOW.) Some printers do not use this

function. For specific information, see the

user’s guide of each printer.

Note:

• The values may vary from printer to printer. See the user’s guide of your printer.

• 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. To prevent noise, these cables should be shielded and

connected to either the chassis of the host computer or the printer (but not at both

ends).

• All interface conditions are based on TTL level. Both the rise and the fall times of each

signal must be less then 0.2 microseconds.

• Data tranfer 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.)

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