Hello, I'm wondering how to determine the C4 and C5 values ​​for the 32MHz osscilator of the STM32WB. Do I need to physically place those capacitors, or are they programmable from the HSE configuration parameters? Thank you, Jorg

[JDoum.1]

[TDK · Accepted solution]

They are configurable between 12-16pF. You'll need to choose a crystal that is compatible with that.

https://www.st.com/resource/en/application_note/dm00403796-precise-hse-frequency-and-startup-time-tuning-for-stm32-wireless-mcus-stmicroelectronics.pdf