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RTC time not persist after resetting/reboot device in STM32WB55 series MCU .

MBari.2
Associate

Hi Team ST,

We are using STM32WB55 series MCU for our project.

RTC time not persist after resetting device

So for that we have comment out below three lines from SystemClock_Config() function.

 //LL_PWR_EnableBkUpAccess();

 // LL_RCC_ForceBackupDomainReset();

 //LL_RCC_ReleaseBackupDomainReset();

After doing this now if we reset/reboot the device then device is not power up.

Is this change impact to device power up stage?

If we uncomment this part then, after resetting board again device is power on and works normally.

So if this change is mandatory then how we can persist RTC time and date?

Let me know if anything required from my side.

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