Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Infineon/XMC4700/SCU_HIBERNATE/OSCSICTRL#0x0
PWD=value1
fOSI Control Register
Turn OFF the fOSI Clock Source
0 (value1): Enabled
1 (value2): Disabled
https://github.com/cmsis-svd/cmsis-svd-data