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Michael99 · 2024-08-15

Hello,I am using a CC4V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC crystal with 22pF caps on a STM32F407ZGT6.problem with some devices the crystal does not oscillate.could the crystal or the capacitors be wrongly designed?What can we change?Thanks for your hel...

Michael99 · 2024-08-23

HiAs you suggested, I have installed a quartz crystal with a capacitance of 6 pF and load capacitances of 6 pF. The result is that the crystal does not oscillate.Do you have any other ideas?

Michael99 · 2024-08-15

We only have one small problem.The layout is in series production. All approvals have been completed.Is there any other possibility than changing the layout?

Michael99 · 2024-08-15

Hello Peter,Thanks for the quick reply.Attached is a part of the board with the LSE Oscillator.We have tested leaving out the two capacitors on the quartz, result: the quartz oscillates.We did the stability calculations for the AN2867 and the result ...

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RTC oscillator STM32F407

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