APPENDIX 2 Parallel Interface

Both the MX-82 and MX-82 F/T include a parallel interface as the standard equip- ment, and this paragraph describes the parallel interface.

(1) Specifications

(a) Data transfer rate:

1000 CPS (min.)

(b) Synchronization:

By externally supplied

STROBE

pulses.

 

 

(c) Handshaking:

By

ACKNLG

or BUSY signal.

(d) Logic level:

Input data and all interface control signals are compa-

 

tible 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

 

 

 

 

 

 

These signals represent information of the

 

 

 

 

 

 

1st to 8th bits of parallel data respectively.

 

 

 

 

 

 

Each signal is at “HIGH” level when data

 

 

 

 

 

 

is logical “1” and “LOW’ when logical

 

 

 

 

 

 

 

 

 

 

 

out

Approx. 5~s pulse. “LOW” indicates that

 

28

ACKN LG

 

data has been received and that the printer

 

 

 

 

is ready to accept other data.

 

 

 

 

A “HIGH” signal indicates that the printer

 

 

 

 

out

cannot receive data. The signal becomes

11

 

BUSY

“HIGH” in the following cases:

29

1. During data entry

 

 

 

 

2. During printing operation

 

 

 

 

3. In OFF-LINE state

 

 

 

 

4. During printer error status.

12

30

PE

-outI

 

A “HIGH” signal indicates that the printer

is out of paper.

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