AVR® USART Overview
Microchip AVR® 8-bit microcontrollers contain a highly flexible communication peripheral known as a USART (Universal Synchronous and Asynchronous serial Receiver and Transmitter).
This peripheral can be used to communicate with a wide variety of other components, including other microcontrollers, wireless modules, LCD displays, GPS modules, etc. The USART peripheral can operate in one of two main modes: Synchronous or Asynchronous.
This module focuses on the Asynchronous Mode of operation.