imx7d power up sequence issue

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imx7d power up sequence issue

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felixhsu
Contributor III

Hi All

Platform: i.MX7D with PF3000

Software: Linux 4.1.15.2.0.0

When power up the VLDO3V3 will have abnormal signal then pull high, why reason will bring abnormal signal?

How to fixed abnormal signal?

Thanks.

i.MX7D EVB

power up nxp evb.jpg

Customer board

power up svh.jpg

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art
NXP Employee
NXP Employee

There is nothing abnormal here. The small initial voltage on the VLDO3V3 power rail is most likely caused by some current back leakage somewhere in the hardware. It should not affect the hardware functionality.


Have a great day,
Artur

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