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?]

Nearby terms:
star network « Starset « STARSYS « start bit » start of authority » Start Of Header » Start Of Text