Does separate regulator for imxrt1170 NVCC_SD1 pin needed?

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Does separate regulator for imxrt1170 NVCC_SD1 pin needed?

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burhanhagi
Contributor IV

Hello,

IMXRT1170-EVK-Schematics below uses a separate 3V3 regulator for supplying NVCC_SD1 core of microcontroller. Is it a must? We are on the final way of our custom pcb designing. Please a rapid answer much appreciated. Since EVK below uses POWER GOOD control signal for opening below regulator, we are a little bit confused whether any power sequence exists or not.

burhanh_0-1665728768616.png

burhanh_1-1665728815731.png

In IMXRT1170 Reference manual there is power sequence chart below however it does not mention anyhting special about for powering NVCC_SD1 pin.

burhanh_2-1665728924917.png

Our program will be baremetal and runs codes within RAM or QSPI flash. We will not use any SD card in our design.

 

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jingpan
NXP TechSupport
NXP TechSupport

Hi @burhanhagi ,

No, it is not must. This is only for the flexibility of setting SD voltage.

 

Regards,

Jing

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jingpan
NXP TechSupport
NXP TechSupport

Hi @burhanhagi ,

No, it is not must. This is only for the flexibility of setting SD voltage.

 

Regards,

Jing