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10.3 PIN FUNCTIONS ON INTERFACES
l
Parallel
Interface
Eight-bit character data.
DATA8 is the most significant
bit; DATA1 is the least
significant
bit. High is logic 1
and Low is logic 0.
receipt of data.
11
1 BUSY
1 OUT
1 Low when the printer is ready
to accept data. -
12
PAPER
OUT
Goes High if the printer runs
OUT
out of paper.
13
SELECTED
OUT
High when the printer is on line
14-15
N/C
Unused
16
SIGNAL
Signal ground.
GND
17
CHASSIS
Printer's chassis ground,
GND
1,8
+SVDC
19-30
GND
OUT
isolated from signal ground.
External supply of +SVDC
Twisted pair return signal
._
.
I
'
Signal
Pin No.
XT
31
RESET
IN
32
ERROR
OUT
ground level.
Low input resets the printer to
its power-on condition.
Goes low to signal that the
printer cannot print due to an
error condition.
101
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