Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Spansion/MB9BF36xx/RTC/VBDDR#0x0
register VBDDR
bitfield VDDR0
bitfield VDDR1
bitfield VDDR2
bitfield VDDR3
https://github.com/cmsis-svd/cmsis-svd-data