Epson GQ-3500, User Manual

Page: 154 / 165

The first jumper, labeled AUTO on the left and PS3 on the right,
controls the AUTO FEED function. The AUTO FEED signal on pin 14 is
ignored unless this jumper
is in the
AUTO position.
The second and third jumpers change the state
of two of the signals
on the interface. The STROBE (STB) and BUSY signals can be changed
from + to -by changing the corresponding jumper.
Pin Assignments
Table F-3 shows connector pin assignments and describes the
respective interface signals.
Table
F-3.
Pins
and
signals
Signal Return
Signal tion Description
1 19 STROBE IN The strobe pulse is used to
synchronize the timing when
the data lines are read. A
pulse width of at least 0.5
microseconds is required.
Ordinarily, this signal is kept
HIGH; data is read when it
drops to LOW. However, the
phase of this signal can be
reversed (move the second
jumper under J-l from + to
so that data is read at
the leading edge (as the
signal goes from LOW to
HIGH).
Parallel Interface
F - 3