Arduino Due Vin

What voltage should be given to the Vin pin on Arduino Due? 3,3V or 5V Thenk you

6volt absolute minimum on V-in if you want a stable 5volt for the 5volt rail of the Due. 6.6volt minimum if you also want the USB supply to disconnect. https://www.arduino.cc/en/Main/ArduinoBoardDue Leo..