SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Before entering sleep, it must be ensured that all write requests to the AON registers are completed. This is done by the hardware in the MCU domain.
Upon wakeup from sleep, the application must wait for one 2 MHz MF period. This wait ensures that the MCU domain register interface is correctly synchronized. If registers are read before synchronization is completed, the value might not be updated. For example, reading the AON_RTC:SEC register might show the value from before entering sleep, and not the current value.