With a large enough HSE input frequency, the vco clock calculation will overflow a u32. Therefore, in this specific case we have to use the inner value and cast to u64 to ensure the mul isn't clipped before applying the divider.
With a large enough HSE input frequency, the vco clock calculation will overflow a u32. Therefore, in this specific case we have to use the inner value and cast to u64 to ensure the mul isn't clipped before applying the divider.