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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
3) When the PAUSE button is pressed
4) During an error state.
12
30 PE
OUT
A HIGH signal indicates that the printer
is out of paper.
13 -
SLCT
OUT
Pulled up to 5 V through 3.3 Kohm
resistance.
14 -
AUTO
IN
When this signal is LOW, the paper is
FEED
automatically fed one line after printing.
XT
(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 a paper-out state
2) when the PAUSE button is pressed
3) in an error state.
Technical Specifications
7-11