iMX RT1060 decoupling issue

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iMX RT1060 decoupling issue

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antoinezen
Contributor III

Hi, 

We fond disagreement between the "Hardware Development Guide for the MIMXRT1050/MIMXRT1060 Applications Processor, Rev.3" and the "MIMXRT1060-EVK" schematics, that we use as reference, on the decoupling caps required. This might be a minor issue, but we like to have this clear. There is two distinct disagreements:

VDD_SNVS_CAP

For this power rail, table  2 of the Hardware Development Guide recomend the following:

pastedImage_1.png

So tow caps, one 220nF and one 4.7uF, fine. Here is the EVK schematics: 

pastedImage_2.png

Only 220nF. Here the EVK does not follow the recommendation for the  Hardware Development Guide. Is that fine or should we stick to the recommendation ?

DCDC-LP

Here the Hardware Development Guide says: 

pastedImage_5.png

pastedImage_6.png

The EVK schematics shows:

pastedImage_7.png

Is the C37 required ? Also, there is also a lot of decoupling caps on VDD_SOC_IN that would count in the 33uF as the Hardware Development guide says. Should we lower C36 value?

What should we follow on those two cases ? EVK schematics of Hardware Development Guide ?

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fangfang
NXP TechSupport
NXP TechSupport

Hello,

Hardware Development Guide is the reference for the customer. EVK schematics is confirmed by our expert team. You may refer to the Hardware Development Guide and follow the EVK schematics.

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