Use of this resistor in oscillator of Stm32f429zit6 Discovery development board

[Arya Kumar]

Hello all can you let me know usage of this resistor in stm32f429zit6 discovery development board.



Link of datasheet
https://www.st.com/content/ccc/reso...df/jcr:content/translations/en.DM00093903.pdf

Page no 32.

I am designing pcb and i want to know the use of it.

 

[KlausST]

Hi,

With the use of this resistor you may optimize on start up time or you may optimize on power consumption.

The resistor is not mainly related to the microcontroller but to the used XTAL.

Thus I recommend to read through the application information of the XTAL you decide to use.
Each XTAL manufacturer usually provide such documents.
Like this: https://ecsxtal.com/store/pdf/Oscillation-Circut-Design-Considerations.pdf

Klaus