Originally Posted by HipHopScribe
Austriamicrosystems AS3525, according to a quick google search
That's correct, according to Daniel (http://daniel.haxx.se/sansa/v2.html
All these models now have the AS3525 from Austriamicrosystems (AMS) as their main SoC chip. They (AMS) do not offer the data sheet for this chip publicly.
Sansa Models known to be using the "v2" concept:
* Sansa E200 v2
* Sansa C200 v2
* Sansa M200 (the newer)
* Sansa Clip
* Sansa Fuze
I asked AMS for the AS3525 data sheet, and I got it.