To effect secure boot immediately, which boot sequence does it need?

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To effect secure boot immediately, which boot sequence does it need?

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takayuki_ishii
Contributor III

Hello community

In Document "i.MX_6_Linux_High_Assurance_Boot_(HAB)_Users_Guide_201405.pdf",

It have a sequence to put SEC_CONFIG to close in section 4 "Test Procedure".

After write eFuse by echo command,

In chapter 19, it say that "Boot the board again,",

Is this mean that to effect the chip security immediately, it must need a power on/off cycle?

Or it need only reset (POR_B Low cycle) to do that?

To reduce the eFuse write cycle time, customer plan to use "POR_B" cycle for it.

Best regards,

Ishii.

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Ishii

you are right, to effect the chip security immediately it is

sufficient only reset (POR_B Low cycle) to do that.

Best regards
igor
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takayuki_ishii
Contributor III

Hello Igor,

Thank you for your quick response.

I will answer it to my customer.

Best regards,

Ishii.

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Ishii

you are right, to effect the chip security immediately it is

sufficient only reset (POR_B Low cycle) to do that.

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

View solution in original post

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