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The FX-286 printers use a parallel interface to communicate with
the computer; this appendix describes it.
Connector pin assignments and a description of respective interface
signals are shown in Table E-1.
Signal Return
Pin
Pin
1
19
20
2
21
3
22
4
5
23
24
6
7
25
26
8
27
9
10
28
11
29
12
30
Appendix E
The Parallel Interface
Table E-1. Pins and signals
Direc-
Signal
tion
IN
STROBE
IN
DATA 1
IN
DATA 2
IN
DATA 3
IN
DATA 4
IN
DATA 5
IN
DATA 6
IN
DATA 7
IN
DATA 8
OUT Approximately, 12-microsecond pulse.
ACKNLG
OUT A HIGH signal indicates that the
BUSY
OUT A HIGH signal indicates that the
PE
Description
STROBE pulse to read data in. Pulse
width must be more than 0.5
microseconds at the receiving
terminal.
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 it is logical 0.
LOW indicates that data has been
received and that the printer is ready
to accept more data.
printer cannot receive data. The signal
goes HIGH in the following cases:
1) During data entry (ea. char. time)
2) During printing
3) When Off Line
4) During printer-error state
printer is out of paper.
E-1
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