Microchip AVR® 8-bit microcontrollers contain a highly flexible communication peripheral known as a Universal Synchronous and Asynchronous Serial Receiver and Transmitter (USART).
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.
If you need to work with Microchip Support staff directly, you can submit a technical support case. Keep in mind that many questions can be answered through our self-help resources, so this may not be your speediest option.