SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Sleep and auto-idle modes are embedded power-saving features. Power-reduction techniques can be applied at the system level by shutting down certain internal clock and power domains of the device.
The UART supports an idle req/idle ack handshaking protocol used at the system level to shut down the UART clocks in a clean and controlled manner and to switch the UART from interrupt-generation mode to wake-up generation mode for unmasked events (see the UARTi.UART_SYSC[2] ENAWAKEUP bit and the UARTi.UART_WER register).
For more information, see Module Level Clock Management, Power, Reset, and Clock Management.