Encyclopedia > Parallel port

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Parallel port

In computing, a parallel port is an interface from a computer system where data is transferred in or out in parallel, that is, on more than one wire. A parallel port carries one bit on each wire thus multiplying the transfer rate obtainable over a single cable. There will usually be some control signals on the port as well to say when data is ready to be sent or received.

It is mostly used by a microprocessor to communicate with peripherals. The commonest kind of parallel port is a printer port, e.g. a Centronics port which transfers eight bits at a time. Disks are also connected via special parallel ports, e.g. SCSI or ATA.

The examples of parallel ports:

See also serial port.

Parts of this article were originally based on material from FOLDOC, used with permission. Update as needed.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
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