About PMIC and CPU

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taka01
Contributor I

About the following 3 products.

① CPU: MCIMX6Y2CVM08AB
② PMIC1: MC34PF3001A7EP
③ PMIC2: MC34PF3001A6EP

Originally, it is a combination of (1) and (2), but when we consulted before, we were able to confirm the place where we evaluated it in (1) and (3) and the place where it works, but one point is really the following content. I would like to know the manufacturer's view as to whether there is any problem.

<Combination of ①-③>
・ After turning on the power, u-boot first changes the required voltage level in the PMIC register settings before booting.
* Because there is a difference in some voltages between ② and ③.
・ I have confirmed the operation with this method without any problem, but in the unlikely event of a momentary power failure (when the voltage drops), the PMIC will perform an OFF sequence, and when the voltage returns, it will be reset and an ON sequence will be performed. But at this time, is the CPU doing the same thing?
If so, it would be fine, but if it is different, it may not work properly?
I was wondering.

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igorpadykov
NXP Employee
NXP Employee

Hi Takahiro

 

>..it will be reset and an ON sequence will be performed. But at this time, is the CPU doing the same thing?
>If so, it would be fine, but if it is different, it may not work properly?.

yes CPU is "doing the same thing", that is starts uboot after reset.

 

Best regards
igor

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igorpadykov
NXP Employee
NXP Employee

Hi Takahiro

 

>..it will be reset and an ON sequence will be performed. But at this time, is the CPU doing the same thing?
>If so, it would be fine, but if it is different, it may not work properly?.

yes CPU is "doing the same thing", that is starts uboot after reset.

 

Best regards
igor