In the datasheet it is written:
"A Clock Security System on LSE can be activated by software writing the LSECSSON bit inthe Control/status register (RCC_CSR)."
This bit is not in the CSR register but in the BDCR register.
Hello Clonimus74 ,
Thank you for reporting this typo and bringing it to our attention.
I confirm this typo error and reported it internally to correct the related reference manual in coming release.
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