POR_B Design

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POR_B Design

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Sam_ECU
Contributor V

Hello,

On the EVK for 1011 and 1062, the POR_B signal is pulled up to DCDC_3V3:

Sam_ECU_0-1708005288522.png

Sam_ECU_1-1708005343809.png

But then in AN13202, it's recommended to pull up the signal to SNVS:

https://www.nxp.com/docs/en/application-note/AN13202.pdf

Sam_ECU_2-1708005407484.png

Question:

What is the best voltage source or it doesn't matter?

 

Regards,

Sam

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EdwinHz
NXP TechSupport
NXP TechSupport

Hi @Sam_ECU,

The best practice for POR_B is to pull up to VDD_SNVS_IN, as mentioned on AN13202 as well as the Hardware Development Guide of each i.MX RT.

BR,
Edwin.

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EdwinHz
NXP TechSupport
NXP TechSupport

Hi @Sam_ECU,

The best practice for POR_B is to pull up to VDD_SNVS_IN, as mentioned on AN13202 as well as the Hardware Development Guide of each i.MX RT.

BR,
Edwin.

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