start bit

start bit

[′stärt ‚bit]
(computer science)
The first bit transmitted in asynchronous data transmission to unequivocally indicate the start of the word.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

start bit

(protocol)
A bit which signals the start of transmission of a character on a serial line. For an RS-423 signal, the line is normally at logical zero which there is no data and the start bit is a logical one. The zero-one transition tells the receiver when to start sampling the signal to extract the data bits.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

start bit

In asynchronous communications, the bit transmitted before each character.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
The transmitting device initiates transfers using a start bit. This is followed by the address of the destination device.
Triggering can be set relative to the start bit, stop bit, restart, or No Ack command as well as on a specific data or address value.