OK - I received the X51v board finally and I'm looking at it. It will take me a little while to check this out and I'm taking pictures and making notes as I go through this so please bear with me as it's also starting to get busy where I work - you know - real work. ;)
I also found this interesting link on a Chinese(?) "Programmers United Development Network" website:
http://www.pudn.com/downloads51/sour...4%CB%FB&kw=USB
And Google can translate it:
http://translate.google.com/translat...lr%3D%26sa%3DN