Serial port don't works with pin 82

Hardware Arduino Due
1

Hello,

I have a bug ! When I put pin 82 (AD3) in input or output, my serial port don't works. I can't see debug on my computer with serial port.

thank

2

See pinout diagram: pin 82 is A4 .

3

Ok but the problem it's with pin A3 / 81 / A.22 / AD4 / D57