316
Ports
Parallel Port
A parallel port is a parallel communication physical interface through which
information transfers in or out 8 bits of data (1 byte) at a time. These 8 bits
are transmitted parallel to each other, as opposed to the same eight bits being
transmitted serially (all in a single row) through a serial port. A parallel port is
also known as a printer port or Centronics port and is commonly used to
connect to a printer.
Pin
Signal
Pin
Signal
1
/STROBE
14
/AUTOFD
2
D0
15
/ERROR
3
D1
16
/INIT
4
D2
17
/SELIN
5
D3
18
GND
6
D4
19
GND
7
D5
20
GND
8
D6
21
GND
9
D7
22
GND
10
/ACK
23
GND
11
BUSY
24
GND
12
PE
25
GND
13
SEL
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