2024-04-29 09:16 PM
We are using the STM32WB55MMG SIP module for a simple BLE application and came across the following behavior.
Since the module comes packaged with LSE crystal and associated passives, we believe that the hardware design is proven
2024-06-01 08:16 AM
Dear @vishalkeshavamurthy ,
Only for testing and debug purposes , can you change the drive level to the highest mode or lower by Firmware change and after Completely remove the battery and power on again to see if behavior still the same with the bad module ?
STM32WB55_CM4/RCC/BDCR/LSEDRV:0x2
and let us know .
Hope it helps ,
STOne-32
2024-06-02 10:13 PM
Thank you for the response
I had tried changing the drive strength, as well as the LSE startup timeout to 10s from the default 5s. Neither of these changes made a difference.
I was able to circumvent the issue however by disabling the clock security LSECSS for the LSE. I still have not found a satisfactory explanation for this behavior though