SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Wake-up interrupt is a special interrupt that works differently from other interrupts. This interrupt is enabled when the UARTi.UART_SCR[4] RX_CTS_WU_EN bit is set to 1. The UARTi.UART_IIR register is not modified when this occurs; the UART3.UART_SSR[1] RX_CTS_WU_STS bit must be checked to detect a wake-up event.
When a wake-up interrupt occurs, it can be cleared only by resetting the UARTi.UART_SCR[4] RX_CTS_WU_EN bit. This bit must be reenabled (set to 1) after the current wake-up interrupt event is processed to detect the next incoming wake-up event.