Epson Stylus 800 Series User Manual page 71

The table below provides the connector pin assignments and describes
their respective interface signals.
1
A-8 Appendix
IN
STROBE
DATA 1 IN
DATA 2 IN
DATA 3 IN
DATA 4 IN
DATA 5 IN
DATA 6 IN
DATA 7 IN
DATA 8
IN
OUT
BUSY OUT
OUT
OUT
AUTO IN
STROBE pulse to read data.
Pulse width must be more
than 0.5 microseconds at
the receiving terminal.
These signals represent
information of bits 1 to
to 8 of parallel
data, respectively.
Each signal is at HIGH
level when data is
logical 1 and LOW when
it is logical 0.
About a 1 O-microsecond
pulse. LOW indicates that
data has been received and
that the printer is ready
to accept more data.
A HIGH signal indicates the
printer cannot receive data.
The signal goes HIGH in the
following cases:
(for each character)
A HIGH signal indicates the
printer is in a paper-out
state or in an error state.
Pulled up to 5 V through
When this signal is LOW, the
paper is automatically fed
one line after printing.
(The signal level can be
fixed to this by setting
Auto Line Feed to on in the
default-settings mode.)