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CC2640: capacitor values for the crystals / oscillators

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Part Number:CC2640

hi,

a customer of mine is considering using the crystals:

Y1 -  Q0.032768-JTX310-12.5pF-20-T1  (32KHz)
C17, C18 22pF MLCC

Y2 Q24.0-JXS32-8-10/30-FU-LF  (24MHz)
C22 and C23 are 15 pF MLCC 

he also selected the capacitor C17 ... C23 as for the value above:

could you help me understand if these values are ok and/or how to calculate them?

thanks a lot in advance

KR

Vincenzo


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