SPRUJB3 March 2024 AM67 , AM67A , TDA4AEN-Q1 , TDA4VEN-Q1
Wake-up interrupt is a special interrupt that works differently from other interrupts. This interrupt is enabled when the UART_SCR[4] RX_CTS_WU_EN bit is set to 1. The UART_IIR_UART register is not modified when this occurs; the 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 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.