- Application Note AN2867: Guidelines for oscillator design on STM8AF/AL/S
and STM32 MCUs/MPUs - https://www.st.com/resource/en/application_note/an2867-guidelines-for-oscillator-design-on-stm8afals-and-stm32-mcusmpus-stmicroelectronics.pdf - Condensed Version - http://nic.vajn.icu/PDF/STMicro/ARM/Oscillator_design_guide.pdf
- Learned about crystal oscillator model, external circuitry, drive level etc.
- Bit of conflicting information between value that should be used for Cs (total stray capacitance) from microcontroller data sheet, Phil's lab notes, online, this application note etc. This is a big deal because it affects what the value of CL1 and CL2 should be, decided on Cs = 5p
- With Phil's lab notes, Rext should max be 70 ohms, will have it at 0 ohms for now, see how it works in the future
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