Hi
I test this function in EVB successfully,step setting below:
1: Configure it in debug mode
2: Enter into normal mode
3:directly setting IO_OUT_AMUX register bit 6-7 as '11'
4: jumper 21 setting to connect PIN3 with PIN2 then LED-D10 state is ON.
5: setting IO_OUT_AMUX register bit 6-7 as '01' then the LED-D10 is OFF.
You can download the EVB schematic or other information below:
KITFS4503CAEEVM | Evaluation Board for FS4500 | NXP