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KL82 RTC load capacitance setting

Question asked by Diandi Zhu on Dec 2, 2016
Latest reply on Dec 6, 2016 by Diandi Zhu

I have this crystal as my rtc timer clock: NX2012SA-32.768K-STD-MUB-1 NDK | Crystals, Oscillators, Resonators | DigiKey  for a KL82 micro controller. Any the RTC is drifting a lot. So I looked into the datasheets and found load capacitance setting on page 1299 of the manual:

cause there is no 12.5pf setting, should I enable SC16P bit or should I enable both SC8P and SC4P?

What's the meaning of enable the additional load? When I set these bits, do they enable the cap inside mcu or just tell the mcu we have a crystal which has this amount of load capacitance?



Thank you very in advance.