Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA4M1AB/SYSTEM/VBTCR1#0x0
BPWSWSTP=0
VBATT Control Register1
Battery Power supply Switch Stop
0 (0): Battery Power supply Switch Enable
1 (1): Battery Power supply Switch stop
These bits are read as 0000000. The write value should be 0000000.
https://github.com/cmsis-svd/cmsis-svd-data