I don't think there is an N330, I guess that it's just a typo, as everyone is so used to typing the N270.
I could not find this cpu anywhere from Intel Website.
Have you seen these 2 links?
May be you can check with the one who posted the above doc on the communities.
From the above information, it appears that the atom n330 may be the same as atom 330.
Hope someone can clarify this here.
All the best,
Is the Atom N330 a 64 or 32 bit processor?