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underclocking STM32F030

Question asked by osmancik.lukas on Nov 4, 2014
Latest reply on Nov 5, 2014 by osmancik.lukas
I have problem when underclocking STM32F030.

When I setup to RCC->
higher value than RCC_CFGR2_PREDIV1_DIV4 (for example DIV5 - DIV16)
then PLL is never ready ( RCC_CR_PLLRDY )

With value <= RCC_CFGR2_PREDIV1_DIV4    its OK and works. Where could be an issue?