Epson 1170 - Manual (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:
During data entry (ea. char. time)
2) During printing
12 30
13
3) When PAUSE 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
resistance.
14 AUTO IN When this signal is LOW, the paper is
FEED automatically fed 1 line after printing.
(The signal level can be fixed to this by
setting DIP switch to ON.)
15 NC Not used.
16 Logic ground level.
17 C H A S S I S Printer’s chassis ground, which is
isolated from the logic ground.
18 NC Not used.
Twisted-pair return signal ground level.
31 1 6 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:
in paper out state
2) PAUSE
3) in error state.
Technical Specifications 7-11