2.3.2
Parallel Interface
The parallel interface of POS88VI printer is compatible with CENTRONICS,
supports BUSY or ACK handshaking protocol,
The pin assignment of 36PIN parallel interface is as Fig. 2-5 shows:
Pin No.
Signal
Direction
Description
1
STROBE
In
Strobe pulse to latch data, Reading
occurs at falling edge.
2
D1
In
3
D2
In
4
D3
In
5
D4
In
6
D5
In
7
D6
In
8
D7
In
9
D8
In
These signals represent the 1st bit
to 8th bit of the parallel data
representatively, each signal is at
HIGH level when data is logic 1,
and LOW when data is logic 0.
10
ACK
Out
Answer pulse, LOW level signal
indicates that data have already
been received and the printer gets
ready to receive the next data.
11
BUSY
Out
HIGH level signal indicates that the
printer is BUSY and can not
receive data.
12
PE
Out
HIGH level signal indicates that
paper is end.
13
SEL
Out
Pulling up to HIGH level signal by a
resistor
17
FG
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Signal Cover
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