Crystal Load capacitance

One of the important part in microcontroller is the external crystal attached to it. Whether it be High frequency clock or low frequency clock, selecting the right crystal is the important design aspect here. The microcontroller vendors do provide details on this in their datasheets. Here is one of the recommendation from the Microchip in one of their application notes.

The application note can be accessed from the below link:

https://ww1.microchip.com/downloads/en/appnotes/atmel-42068-crystal-characterization-for-avr-rf_application-note_avr2067.pdf