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c.
Parallel Interface
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The FX-80 includes as standard equipment a parallel interface, which is described
below.
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(1) Specifications
(a) Synchronization:
By externally supplied STROBE pulses.
(b) Handshaking:
By ACKNLG or BUSY signals.
(c) Logic level:
Input data and all interface control
signals are 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 C-l.
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Table C-1
Connector Pin Assignment and Descriptions of Interface Signals
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Signal
Return
Signal
Direction
Description
Pin No.
Pin No.
1
19
STROBE
In
STROBE pulse to read data in. Pulse width
must be more than 0.5
!ks
at receiving
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terminal.
2
20
DATA 1
In
These signals represent information of the
1 st to 8th bits of parallel data respectively.
3
21
DATA 2
In
Each signal is at "HIGH" level when data
is logical "1" and "LOW" when logical
4
22
DATA 3
In
"0".
5
23
DATA 4
In
6
24
DATA 5
In
7
25
DATA 6
In
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8
26
DATA 7
In
9
27
DATA 8
In
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10
28
ACKNLG
Out
Approx. 12
!ks
pulse. "LOW" indicates
that data has been received and that the
printer is ready to accept other data.
11
29
BUSY
Out
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.
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C-l
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