I create this discussion because I am so screwed with my Microcontroller SAMD21G. I designed a board to drive six motors and as soon as I supply the board, a shortcut is created inside the Microcontroller itself. I replaced it three times and it did this everytime. I checked the schematic and I realized that I plugged the VDDANA pin through a EMI filter and a capacitor of 0.1 uF. I checked inside the datasheet, there is nothing said on the fact that not to plug this VDDANA pin to VCC.
I don't understand why it keeps blowing up. My boss tells me that it should just not make the ADC/DAC work but no big deal because I don't use it.
VDDANA also supplies the inside oscillator but I am using an external crystal.
I don't know what happens and I can't order a new board if I don't know what's wrong with this one...
Thanks for your advices
The french man Lambi