Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6M3AH/EPTPC/STCFR#0x0
STCF=00
STCA Clock Frequency Setting Register
STCA Clock Frequency
0 (00): 20MHz
1 (01): 25MHz
2 (10): 50MHz
3 (11): 100 MHz
https://github.com/cmsis-svd/cmsis-svd-data