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STM32L15xxC Vcore Range 3 must not be used

Question asked by coromina on Oct 19, 2015
Hi all,

Having a look at the Errata sheet for STM32L100RC and STM32L15xxC (DocID025807 Rev 4) I could read in point 2.1.4 Range 3 of dynamic voltage scaling cannot be used.
In fact, in further detail description says "must not be used"

I suppose just the people who found the bug know about it but, what are the consequences of using range3 in these uP?

I find this pretty worrying.