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Correct function about PMIC_STBY_REQ signal on Power-Up sequence.

Question asked by Takayuki Ishii on Oct 23, 2016
Latest reply on Oct 24, 2016 by Takayuki Ishii

Dear Team,


My customer ask me about PMIC_STBY_REQ signal between VSNVS power-up and POR_B to Hi.

It have some QA in Community but answer have 2 type.


One is a keep L signal is correct and must check power-up sequence.

Other is a undefined state so signal can not fixed to L or H.


Signal on our customer board, go to H after VSNVS on and return L before POR_B to H.

Does It have some problem on customer board and it must fixed?

or It is correct because signal state is undefined.


Which is correct answer?


Best regards,