[GENERAL] My question is why a short glitch can be recognized as a start bit by UART interface, because the bit timing is 104us for Baudrate=9600. Can you please give to me a description of the receiving algorithm of the UART interface?

Any “short” pulse on the RXD pin will be interpreted as a start bit even if it is much shorter than 104 us. This is similar to an interrupt input. The RF module UART is a HW UART, so there is no SW algorithm involved.

Last Update: October 23, 2017