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MK22FN :  VREGIN pin is powered  when MCU VDD is off.

Question asked by koichi sakagami on Feb 21, 2016
Latest reply on Feb 22, 2016 by koichi sakagami

Dear community,

We have been developing our product with MK22FN1M0AVMC12.

We worry about a situation as follows.


The VREGIN pin is connected to VBUS(5v) with USB connector.
When 5v is applied to the  VREGIN pin, the MCU 3.3v voltage is not applied to VDD pin yet.


    Does such a situation have any problem for MK22 ?
    For example,
    does it decrease the lifetime of MK22 ?


Best Regards,
    Koichi Sakagami