Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Fujitsu/S6E1A1/FASTIO/FPDIR1#0x0
Fast GPIO Input Data Register 1
Bit0 of FPDIR1
Bit1 of FPDIR1
Bit2 of FPDIR1
Bit3 of FPDIR1
Bit4 of FPDIR1
Bit5 of FPDIR1
https://github.com/cmsis-svd/cmsis-svd-data