📈UART Protocol
Notes on USART/UART protocol
Introduction
Async protocol , uses same baudrate beteween devices to communicate
Its just converting parallel data into a serial format
data frame has a start, data, parity , stop bits
low speed communication usually used for getting debugging info or simple communication
Configuration / Connection
RX and TX pins are used to connect
If Hardware flow control is present RTS and CTS pins will be required as well. ( Request to Send and Clear to Send).
Details
Data frame constitutes a start bit + data(8 or 9 bits) + parity bit and finally stop bit (1 or 2 bits)
even parity vs odd parity : In even parity the number of 1s is always even including parity bit whereas in odd parity number of 1s is odd including the parity bit.
Usage and limitations
Used for short distance communication or slower communication
can be seen used for debugging devices
Reference:
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