stm32f051c8: powering-up of analog part is mandatory

[sdobrets]

Posted on October 31, 2015 at 18:58

Hi all,

I've found a surprising behaviour of stm32f051c8 controller. For simplicity reasons, power was provided for IO and core parts only, analog part excluded. STLink utility is unable to connect to the device. Is there an explanation for this?

[waclawek.jan]

Posted on October 31, 2015 at 19:57

Reset is driven from analog part, at least. Stick to the datasheet requirements - VDDA should be within a small difference from VDD.

Is there such thing, an mcu with truly separate analog, at all?

JW