fix: Increases drive strength of the 32kHz external crystal #7663
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… calculations specified in ST AN2867 sections 3.3, 3.4, and STM32L4 datasheet DS12023 Table 58. LSE oscillator characteristics. The drive strength RCC_LSEDRIVE_LOW is marginal for the 32kHz crystal oscillator stability, and RCC_LSEDRIVE_MEDIUMLOW meets the calculated drive strength with a small margin for parasitic capacitance.
dhalbert
requested changes
Feb 28, 2023
dhalbert
approved these changes
Mar 1, 2023
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Increases drive strength of 32kHz external crystal (LSE), in line with calculations specified in ST AN2867 sections 3.3, 3.4, and STM32L4 datasheet DS12023 Table 58. LSE oscillator characteristics.
The drive strength
RCC_LSEDRIVE_LOWis marginal for the 32kHz crystal oscillator stability, andRCC_LSEDRIVE_MEDIUMLOWmeets the calculated drive strength with a small margin for parasitic capacitance.