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Signal Return
Pin Pin Signal Direction Deccriptlon
11
29
BUSY
OUT A HIGH signal
Indicates
the
printer cannot
receive
data.
The
signal
goes HIGH in the
following cases:
1)
During
data entry (for each
character)
2)
During
printlng
3)
When the Pause button is
pressed
12
30
13
-
PE
SLCT
OUT
OUT
4)
During
an
errar
state
A HIGH signal indicates that
the printer is out of paper.
Pulled up to 5
V
through
1
.O
kQ
resistance
14
-
AUTO
IN
When this signal is LOW, the
FEED
paper
b
automatically fed
E
one line after printing.
15
-
NC Not
used
16
-
GND
Logic
ground level
17
-
CHASSIS
-
Printer’s chassis ground,
GND
which is isolated from the
logic
ground
18
-
NC
19-30
-
GND
Not used
Twisted-pair
return
signal
ground level
31
16
KiT
IN
When this level becomes
LOW, the
printer
controller is
reset to its state when the
power
ls
first turned on and
the
print
buffer
Is
cleared.
This level& normally HIGH;
Its
pulse
width must be more
than
50
us
at the receiving
terminal.
Appendix A-9