start bit

start bit

[′stärt ‚bit]
(computer science)
The first bit transmitted in asynchronous data transmission to unequivocally indicate the start of the word.

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.

start bit

In asynchronous communications, the bit transmitted before each character.
References in periodicals archive ?
Wait for falling edge to be detected, after detecting falling edge sample after 52[micro]sec if sampled bit is 0 then start bit is being detected.
In one embodiment of the present invention, preamble and synchronization word patterns are selected such that the start bit of the first byte of data that follows the synchronization word synchronizes with the start bit clocking signal of the baseband receiving serial port.
start bit of all his applaud It all began to go wrong for Rovers from the moment rookie defender Jermaine Grandison, so impressive against Peterborough the week before, attempted a long pass from inside his own half after seven minutes.