capsense proximity sensing using only one wire

Hi all

I want to know hardware considerations for capsense proximity sensing using only one wire. In datasheet it is given for button , slider etc.

Which parameters i should look for proximity sensing using only one wire.  Is there necessity of Cmod Csh_tank Cint for proximity sensing using only one wire

http://www.cypress.com/file/46081/download

i am reffering the above pdf