[swegg]

I don't understand the decap network: why not go something more classical 10n, 0.1u and 4.7u, i.e. just a cap for each frequency range?

[pawadu]

I think its to place them near each VCC to minimize effect of wire parasitics. Dave probably explains it better:

https://youtu.be/BcJ6UdDx1vg?t=5m58s

[schwarrrtz]

Pretty sure each cap is associated with a particular pin on the microcontroller.