SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The MPU can access the RTC_STATUS_REG and the RTC_CTRL_REG registers at any time (except the CTRL_REG[5] bit, which must be changed only when the RTC is stopped). For the RTC_INTERRUPTS_REG register, the MPU should respect the available access period to prevent spurious interrupt.
The RTC_DISABLE bit of the RTC_CTRL_REG register must only be used to completely disable the RTC function. When this bit is set, the 32-kHz clock is gated, and the RTC is frozen. From this point, resetting the RTC_DISABLE bit to zero can lead to unexpected behavior. To save power, this bit should only be used if the RTC function is unwanted in the application.