Epson M X - 8 0 Benutzerhandbuch

APPENDIX 2 Parallel Interface

Both the MX-80 Type II and MX-80 F/T Type II include a parallel interface as the

standard equipment, and this paragraph describes the parallel interface.

(1) Specifications

(a) Data transfer rate:

1000 CPS (min.)

(b) Synchronization:

By externally supplied STROBE pulses.

By ACKN LG or BUSY signals.

(d) Logic level:

I n p u t d a t a a n d a l l i n t e r f a c e c o n t r o l s i g n a l s a r e

compatible with the TTL level.

(2) Connector

Plug: 57-30360 (AMPHENOL)

It is recommended that interface cables be kept as short as possible.

(3) Connector pin assignment and descriptions of signals.

Connector pin assignment and descriptions of respective interface signals are

provided in Table A2-1.

Table A2-1 Connector Pin Assignment and Descriptions of Interface Signals

Description

STROBE pulse to read data in. Pulse

width must be more than 0.5µs at receiv-

ing terminal.

The signal level is normally “HIGH”; read-

in of data is performed at the “LOW”
level of this signal.

These signals represent information of the

1st to 8th bits of parallel data respectively.
Each signal is at “HIGH” level when data

is logical “I” and “LOW” when logical

“0”.

Approx. 5µs pulse. "LOW" indicates that

data has been received and that the printer

i s r e a d y t o a c c e p t o t h e r d a t a .

A "HIGH" signal indicates that the printer

cannot receive data. The signal becomes

“HIGH” in the following cases:

1. During data entry

2. During printing operation
3. In OFF-LINE state

4. During printer error status.

A “HIGH” signal indicates that the printer

is out of paper.

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