what's your advantage of using the 32-pin package, apart from saving space? Or can you tell us why you want to go for the 32-pin package?
The application note AN_176 clearly points out that you shouldn't use the 32-pin-Version:
VNC2 - V2DAP: Compatible with 48 and 64 pin VNC2 packages. Limited range of functions with 32-pin package.
Greetz