Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32u5/STM32U535/SYSCFG/CCCR#0x0
compensation cell code register
NCC1
PCC1
NCC2
PCC2
NCC3
PCC3
https://github.com/modm-io/cmsis-svd-stm32