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.
[Is this upside-down?]Last updated: 1995-02-02
Nearby terms:
Starset ♦ STARSYS ♦ start bit ♦ start of authority ♦ Start Of Header
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