Hello @Surya S
when an RDP regression happens, the values of the OEMKEY1 and OEMKEY2 stay as set before the regression. To clear them you have to write 0xFFFFFFFF 0xFFFFFFFF in both OEM1KEY and OEM2KEY
Flash memory option bytes. For more details, refer to the part 10 of the AN5347.
Best Regards.
STTwo-32
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