Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Fujitsu/MB9BF41xS/MFT0/ICU_ICFS10#0x0
“ICU ch.1,0 Connecting FRT Select Register”
Connects FRT ch.x to ICU ch.(0)
Connects FRT ch.x to ICU ch.(1)
https://github.com/cmsis-svd/cmsis-svd-data