Nice read is here, and there should be more...

http://www.eetimes.com/document.asp?doc_id=1327272
and this one has audio details

http://techfocusmedia.net/blog/quicklogic-goes-full-soc-for-sensors/

what is ingenious is how one piece of silicon can be a SoC & a coprocessor reading the details of the audio may give you a headache, but it shows how hard they worked!
I thought it would take 2 to cover the SoC and something else for the coprocessor.