Leakage problem

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Leakage problem

251件の閲覧回数
sapirbuz
Contributor IV

Hi,

We have a leakage problem: our GPIOs are powered before the MCU power banks (see pictures below); the +v3.3_main rail has 2V leakage and as a result, the MCU can't wake up. the SNVS needs to power up before the other rail.

The GPIO pins are powered all the time and we can't change that.

I tried to force the +v3.3_main rail to be 0V, but it changed the GPIOs and affected our design.

since you know better the internal NXP MCU architecture, can you please offer a solution to isolate the +V3.3V_main rail from the GPIOs and solve the leakage problem?

I have attached the design schematics

 

picture 1, the signals that are powered first: ( connected to 3.3V pull-ups rails that are always up):

sapirbuz_0-1685549430879.png

 

picture 2, Are powered after:

sapirbuz_1-1685549468602.png

 

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227件の閲覧回数
Hui_Ma
NXP TechSupport
NXP TechSupport

Hi,

In general, we don't recommend to discuss customer board hardware design at this public community. We would suggest customer to use our confidential support channel to submit a ticket.

Please refer below picture to submit an online technical support ticket, then our engineer will handle/answer that ticket. Thank you for the understanding.

Hui_Ma_0-1685581212522.png

best regards,

Mike

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