Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA4M1AB/DTC/DTCST#0x0
DTCST=0
DTC Module Start Register
DTC Module Start
0 (0): DTC module stop
1 (1): DTC module start
These bits are read as 0000000. The write value should be 0000000.
https://github.com/cmsis-svd/cmsis-svd-data