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stm32h7xx: system clock stalls above 350Mhz #57

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jnaulet opened this issue Jul 9, 2023 · 1 comment
Open

stm32h7xx: system clock stalls above 350Mhz #57

jnaulet opened this issue Jul 9, 2023 · 1 comment
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bug Something isn't working good first issue Good for newcomers

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@jnaulet
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jnaulet commented Jul 9, 2023

The stm32h743 is rated for 400Mhz but when i try to switch the sys_ck to a 400Mhz pll1_p_ck, the system stalls.
@jnaulet jnaulet added bug Something isn't working help wanted Extra attention is needed good first issue Good for newcomers and removed good first issue Good for newcomers labels Jul 9, 2023
@jnaulet
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jnaulet commented Jul 16, 2023

By playing with the voltage scaling & overdrive in PWR & SYSCFG_PWRCR, we can achieve 350Mhz, but 400Mhz is still unstable and stalls or resets.

It probably needs fine tuning, the pll computation might be slightly off & create this problem, for example.

@jnaulet jnaulet added good first issue Good for newcomers and removed help wanted Extra attention is needed labels Jul 16, 2023
@jnaulet jnaulet changed the title stm32h7xx: system clock stalls above 200Mhz stm32h7xx: system clock stalls above 350Mhz Jul 30, 2023
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