Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Fujitsu/MB9BF41xS/GPIO/PFR6#0x0
Port function setting register 6
Bit0 of PFR6
Bit1 of PFR6
Bit2 of PFR6
https://github.com/cmsis-svd/cmsis-svd-data