Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Fujitsu/MB9BF42xS/GPIO/PFRD#0x0
Port function setting register D
Bit0 of PFRD
Bit1 of PFRD
Bit2 of PFRD
Bit3 of PFRD
https://github.com/cmsis-svd/cmsis-svd-data