DP83822I: The power supply for AVD and VDDIO

Part Number:DP83822I

Hi all

Would you mind if we ask DP83822I?

About the power supply for AVD and VDDIO, which is the better the separeted power source or the same power source?
As long as we use 3.3V for  AVD and VDDIO, it doesn't require the separeted power.

Kind regards,

Hirotaka Matsumoto