Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32u5/STM32U545/SAES/CR#0x0
control register
SAES enable
DATATYPE
MODE
CHMOD
DMAINEN
DMAOUTEN
KEYSIZE
KEYPROT
KMOD
KSHAREID
KEYSEL
IPRST
https://github.com/modm-io/cmsis-svd-stm32