Epson 1170 - Page 124

Interface Specifications
Signal Return
Pin
Pin
Signal Direction
Description
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
12
30 PE
13 -
SLCT
3) When PAUSE botton is pressed
4) During printer-error state.
OUT
A HIGH signal indicates that the printer is
out of paper.
OUT
Pulled up to 5 volts through 3.3 Kohm
resistance.
14 - AUTO IN When this signal is LOW, the paper is
FEED automatically fed 1 line after printing.
R=T
(The signal level can be fixed to this by
setting DIP switch 2-4 to ON.)
15 - NC
Not used.
16 - GND - Logic ground level.
17 - CHASSIS - Printer’s chassis ground, which is
GND isolated from the logic ground.
18 - NC
Not used.
19-30 -
GND -
Twisted-pair return signal ground level.
31
16
INIT
IN
When this level becomes LOW, the
printer controller is reset to its power-up
state and the print buffer is cleared. This
level is normally HIGH; its pulse width
must be more than 50 microseconds at
the receiving terminal.
32
ERROR
OUT
This level becomes LOW when the printer
is:
1) in paper out state
2) PAUSE
3) in error state.
Technical Specifications
7-11