what is uart used for
UART is a protocol (Universal asynchronous receiver/transmitter ) for serial transfer of information. You ask about an embedded system with mentioning which so I'll assume that you have a block diagram with one indicating UART.
ECEn/CS 224 Â© 2003-2006. BYU. â¢ A UART may be used when: âHigh speed is not required. âA cheap communication line between two devices. is required. â¢ Asynchronous serial communication is very cheap. âRequires a transmitter and/or receiver. âSingle wire for each direction (plus ground wire) âRelatively simple hardware.