Signal
Pin
Return
Pin
Direction
Description
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 printing
3)
When the PAUSE button is
pressed
4)
During an error state
A HIGH signal indicates that
the printer is out of paper.
Pulled up to 5 V through
1
.O
kR
resistance
When this signal is LOW, the
paper is automatically fed
one line after printing.
Not used
Logic ground level
Printer’s chassis ground,
which is isolated from the
logic ground
Not used
Twisted-pair return signal
ground level
When this level becomes
LOW, the printer controller is
reset to its state when the
power is first turned on and
the print buffer is cleared.
This level is normally HIGH; its
pulse width must be more
than
50
txz
at the receiving
terminal.
I
29
BUSY
OUT
11
OUT
30
PE
SLCT
OUT
12
13
IN
AUTO
FEED
XT
14
15 NC
GND
16
17
CHASSIS
GND
NC
18
19-30
GND
31
16
INIT
IN
Appendix A-9
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