I am working on a senior design project and am trying to embed an ATSAM3X8E (Here is the Application Sheet PDF) micro-controller into a system my team is designing. What is the pourpose of incorperating an inductor into the VDDUTMI (USB 3-3.6V input) and the VDDANA (for ADC and DAC supplies) ? I konw as a senior I should probably know this, but a little help is welcome.
Also, for the number 2 red circle, is that a symbol for a polarized capacitor? I am not used to this representation.
EDIT: Also, why is there no value for the resistor?? What does 1R mean?
(This above schematic can be found on page 4 of the application note file.)