Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Infineon/XMC4300/SCU_CLK/CPUCLKCR#0x0
CPUDIV=Const_0
CPU Clock Control Register
CPU Clock Divider Enable
0 (Const_0): fCPU = fSYS
1 (Const_1): fCPU = fSYS / 2
https://github.com/cmsis-svd/cmsis-svd-data