I'm reading the best practices and harsh environment application notes with the AVR and it's clear I need to add an inductor and capacitor right next to the supply pins of the AVR.
Trouble is, I'm using the mega644 which has three Vcc pins as well as an Aref and AVcc pin. I'm not doing any analog to digital stuff. I'm told the AVcc pin should be connected to 5V even if you're not using it and the Aref doesn't need to be connected to anything.
That makes four pins of incoming 5V. Should I have the inductor/capacitor combo for each of the four? What about the three common pins? Should I throw anything extra on them?