UART and LEUART in EFM32GG12 Microcontroller

In EFM32GG12 Microcontroller from silicon Labs, there are two types of UART.

• Normal UART (UART)
• Low Energy UART (LEUART)

UART is subset of the USART interface (Universal Synchronous/Asynchronous Receiver Transmitter) and is a full duplex asynchronous interface. There is an option for flow control as well.

LEUART is a low power UART and is available in low power modes as well. LEUART operates using 32.768kHz and operates up to a baud rate of 9600 bps. LEUART works with minimal CPU intervention based on the DMA controller as shown in the above block diagram. After receiving the UART frames and transferring them to RAM, CPU can wake up helping in low power consumption to be achieved.