SPRT
７
Fig.2-7 Pin Order of Parallel Port
The pin assignment of parallel interface is shown in Fig. 2-8 shows:
Pin No.
Signal
Direction
Description
1 /STB In
Strobe pulse to latch data,
reading occurs at falling edge.
2
3
4
5
6
7
8
9
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
In
In
In
In
In
In
In
In
These signals represent the 1
st
bit to 8
th
bit of the parallel
interface data, each signal is at
HIGHT 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 indicates
the printer is online.
15 /ERR
Out
Pulling up to HIGH level
signal by a resistor indicates
there is no error.
