Epson MX-82 F/T User Manual - Page 92

Appendix 2-parallel Interface, Table A2-1

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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 11 28 29 -oouuIttACKN LG BUSY 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 Approx. 5~s pulse. "LOW" indicates that data has been received and that the printer is ready to accept other data. 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. 12 30 PE out A "HIGH" signal indicates that the printer is out of paper. -87-

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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
11
28
29
ACKN
LG
BUSY
out
-I
out
Approx.
5~s
pulse. “LOW” indicates that
data has been received and that the printer
is ready to accept other data.
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.
12
30
PE
out
A “HIGH” signal indicates that the printer
is out of paper.
-87-