Skip to Main Content
PC Hardware in a Nutshell, 3rd Edition
book

PC Hardware in a Nutshell, 3rd Edition

by Robert Bruce Thompson, Barbara Fritchman Thompson
July 2003
Beginner to intermediate content levelBeginner to intermediate
874 pages
38h 13m
English
O'Reilly Media, Inc.
Content preview from PC Hardware in a Nutshell, 3rd Edition

Serial Port Standards

Because they transfer only one bit at a time, using serial communications interfaces to establish a unidirectional connection between two devices in theory requires only one data circuit. This circuit comprises one data (or signal) wire and a second wire (called the ground, return, or common) that completes the electrical circuit. In practice, most PC serial communications devices use additional wires to enable bidirectional communication, to provide control circuits between the devices, and so on.

Serial port interface and signaling specifications are defined by the Electronic Industries Association (EIA) standard Interface Between Data Terminal Equipment and Data Communication Equipment Employing Serial Binary Data Interchange, Revision D. This standard is properly abbreviated EIA-232D, but is usually called RS-232C, for the earlier and nearly identical revision C. The ITU (formerly CCITT) defines essentially identical standards as V.24 (interface) and V.28 (signaling).

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Computer Busses

Computer Busses

William Buchanan
Hacker Techniques, Tools, and Incident Handling

Hacker Techniques, Tools, and Incident Handling

Sean-Philip Oriyano, Michael Gregg

Publisher Resources

ISBN: 059600513XErrata Page