SPRT SP-POS88VI User Manual page 12

10 ACK
11 BUSY
12 PE
13 SEL
17 FG
18 Logic-H
32 nFault
14,15,17,
18,34,36 NC
16,19~30, 33 GND
35 +5V
Out
Out
Out
Out
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Out
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Fig.2-6 Signal Timing Chart of Parallel Interface：
Answer pulse, LOW level signal
indicates that data have already
been received and the printer
gets ready to receive the next
data.
HIGH level signal indicates that
the printer is BUSY and can not
receive data.
HIGH level signal indicates that
paper is end.
Pulling up to HIGH level signal
by a resistor
Signal Cover
Logic "1" level
Low level means the printer is at
fault
No connection
Grounding logical 0 level
+5V power
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