Appendix E
The Parallel Interface
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.
Table E-1. Pins and signals
Signal Return
Pin
Pin
Signal
Direc-
tion
Description
1
19
STROBE
IN
STROBE pulse to read data in. Pulse
width must be more than 0.5
microseconds at the receiving
terminal.
2
20
3
21
DATA 1
IN
These signals represent information of
DATA 2
IN
the 1st to 8th bits of parallel data,
4
22
5
23
DATA 3
IN
respectively Each signal is at HIGH
6
DATA 4
IN
level when data is logical 1 and LOW
24
7
8
25
DATA 5
IN
when it is logical 0.
DATA 6
IN
26
DATA 7
IN
9
27
DATA 8
IN
10
28
ACKNLG
OUT Approximately, 12-microsecond pulse.
LOW indicates that data has been
received and that the printer is ready
to accept more data.
11
29
BUSY
OUT A HIGH signal indicates that the
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
12
30 PE
4) During printer-error state
OUT A HIGH signal indicates that the
printer is out of paper.
E-1
Summary of Contents for FX-286 - Impact Printer
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