From my limited experience you most likely have to put the data you want to send into a specific register.
Have you looked at the documentation? Microchip inc. probably has it on their website.
Also try being less specific when you search, i.e. just dspic30f instead of the whole name.
-edit-
this should help...
http://digikey.com/PTM/IndividualPTM...ng=en&ptm=5610