i.MX6ULL Power-Down Sequence VDD_HIGH_IN should be turned on before VDD_SOC_IN

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i.MX6ULL Power-Down Sequence VDD_HIGH_IN should be turned on before VDD_SOC_IN

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健鸿凌
Contributor I

1. 在IMX6ULLIEC手册描述到的掉电时序中,要求VDD_SOC_IN电源需要早于VDD_HIGH_IN电源掉电,但实测原厂的评估板核心板(SCH-29364 REV.A)及底板(SCH-28616 C2)发现掉电时序没有符合该点要求,请问,i.MX6ULL是不是对上电时序要求相对严格,对掉电要求可以不考虑?下图为上下电测试图:

01. 上电时序图

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上电时序018.bmp

02. 掉电时序图

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weidong_sun
NXP TechSupport
NXP TechSupport

Hello Ling

>>i.MX6ULL是不是对上电时序要求相对严格,对掉电要求可以不考虑?

Yes, right. you can think so.

Because we couldn't ensure the sequence at any time, for example, power is suddenly cut.

Have a nice day!

NXP TIC weidong sun

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