S32K1 Internal load capacitance in EXTAL and XTAL pin

[nxp52415]

Hello @jesus_sanchez

Apparently the customer needs to fill up a technical sheet for the OEM, and the internal load capacitance that the Quarz crystal sees is required. see datasheet talks about external load capacitance. Could you help me here to explain why we do not provide this value?

Thanks

[jesus_sanchez · Accepted solution]

Hi Hector

It is simple. The load capacitance is defined as  "the amount of the external circuit capacitance in parallel with the crystal itself".

In other words. The load capacitance is determined/calculated by external capacitors based on the transconductance of the MCU and the crystal characteristics.

Please check my Hardware Design Guidelines for the S32K1xx

Here the link ---------->

https://nxp1.sharepoint.com/:f:/t/8_8/EjntePi1ypBHqyns4M1xu-oBteOmFVhReS6qTooBUplX0g?e=jr9kef