Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Fujitsu/MB9BF41xS/DTIM/TIMER1CONTROL#0x0
Control Register
One-shot mode bit
Counter size bit
Prescale bits
Interrupt enable bit
Mode bit
Enable bit
https://github.com/cmsis-svd/cmsis-svd-data