I have a questions related to the crystal capacitances shown in the TR1329.pdf on page 13. The crystal get to 15pF caps but why? If I look up some equations about the crystal design, there are some equ. where I can use the given manufacturer data, like the load capacitance.
With the given data I get 6pF for each crystal (Cstray considered).
So why are there two 15pF instead of the 6pF?
Thanks in advance.