Crystal suitable for STM32L4R9AI

[Moamen Ayman]

Hello I will use these crystals for STM32L4R9AII6

HSE Crystal 16MHz ±10ppm 8pF 60 Ohms (with external capacitors of 6pf (assuming stray capacitance of 5pf) and ext resistor of 1.6KOhm)

https://www.digikey.com/product-detail/en/jauch-quartz/Q-160-JXS22-8-10-10-WA-LF/1908-1268-1-ND/8108380

RTC CRYSTAL 32768Hz 9pF 20PPM (with external capacitors of 12pf)

https://www.digikey.com/product-detail/en/epson/FC-135-32.7680KA-AC/FC-13532.7680KA-AC-ND/1927426

Is these crystal suitable for this MCU and my values for the external capacitors and resistor correct?

Thanks in Advance!

[Bouraoui Chemli]

Hello,

Both crystals are compatible with STM32L4R9. Also the chosen values of the external capacitors is good.

Please refer to AN2867 (Oscillator design guide for STM8AF/AL/S, STM32 MCUs and MPUs) for more details.

Link to AN2867 : https://www.st.com/content/ccc/resource/technical/document/application_note/c6/eb/5e/11/e3/69/43/eb/CD00221665.pdf/files/CD00221665.pdf/jcr:content/translations/en.CD00221665.pdf

Best regards

Bouraoui