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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,

Ishii.

 

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