Cancel

What is the protocol format of uart?

Last Updated on：2023-01-30 09:46:10

Start bit: first send out a logic "0" signal to indicate the beginning of the transmission character.

Data bit: It can be 5~8 bit logic "0" or "1". Such as ASCII code (7 bits), extended BCD code (8 bits). ASCII code is usually adopted. It is transmitted from the lowest bit.

The parity bit: after adding this number (0 or 1) to the data bit, the number of "1" should be even (even parity) or odd (odd parity).

Stop bit: it is the end of a character data. It can be 1-bit, 1.5-bit, or 2-bit high electrical level.

Idle bit: in the logic "1" state, indicating that there is no data transmission on the current line.