boards: nucleo_g474re: Use HSE instead of HSI (9499dd1a) · Commits · Wenxi XU / zephyr

Change the board defconfig to use the provided 24MHz Crystal instead of the internal resonator. This improves the clock precision and stability. Signed-off-by:

Alexander Wachter <alexander@wachter.cloud>

boards/arm/nucleo_g474re/nucleo_g474re_defconfig

+5 −3

Original line number	Diff line number	Diff line
		@@ -26,18 +26,20 @@ CONFIG_CLOCK_CONTROL=y
		# Use PLLCLK for SYSCLK
		CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y

		# Use HSI (16MHz) to feed into PLL
		CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
		# Use HSE (24MHz) to feed into PLL
		CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
		CONFIG_CLOCK_STM32_HSE_CLOCK=24000000

		CONFIG_CLOCK_STM32_PLL_M_DIVISOR=4
		CONFIG_CLOCK_STM32_PLL_P_DIVISOR=7
		CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
		CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2

		# Produce 150MHz clock at PLLCLK output
		# CONFIG_CLOCK_STM32_PLL_M_DIVISOR=4
		# CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=75

		# Produce 170MHz clock at PLLCLK output
		CONFIG_CLOCK_STM32_PLL_M_DIVISOR=6
		CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=85

		# Produce Max (150MHz or 170MHz) HCLK

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