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[x] Please provide specific title of the PR describing the change
[ ] Please provide related links (eg. Issue which will be closed by this Pull Request)
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Description of Change
fix: Increases the drive strength of 32kHz external crystal for the Swan R5 board 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_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.
Checklist
By completing this PR sufficiently, you help us to review this Pull Request quicker and also help improve the quality of Release Notes
UF2_BOARD_IDin your board.h follow correct format from uf2 specsThis checklist items that are not applicable to your PR can be deleted.
Description of Change
fix: Increases the drive strength of 32kHz external crystal for the Swan R5 board 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_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.