At this very moment I'm writing a paper about Arduino for my studies (Game Technology). I've already covered a big part about the software and the hardware, but I couldn't find any information about the system architecture of an Arduino (CPU, RAM, buses, the protocols it uses, etc.). If there's anyone at all who can give me information about this or point me to a site/document where I can find the info myself, it'd be gladly accepted by me. I want to fill about 3 pages (Calibri, 11) with information (including images), if that's possible...
A great many thank-yous to the people who can help me in advance!