i.mx6q sabrelite OTPMK

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i.mx6q sabrelite OTPMK

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myungjinhwang
Contributor III

dear freescale team.

i could see about OTPMK in some manuals  .

The OTPMK is same with OTP_SRK[0~7] ?

it's really confusing.

it does not mention about OTPMK in IMX6DQRM.pdf file.

i can find only OTP_SRK.

there are SFP_SRKHR n(Super Root Key Hash n) , One Time Programmable Master Key n (SFP_OTPMKRn) each in case of other freescale board in the fuse...

thank you.

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6 Replies

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igorpadykov
NXP TechSupport
NXP TechSupport

HI MyungJin

one can determine if a valid OTPMK has been burned by checking the

OTPMK_ZERO bit in the SNVS_HP Status Register.

In early pre-production parts they did not have the OTPMK fuses provisioned.

On production parts, the OTPMK are be burned by Freescale prior to shipping the

device. The value burned by Freescale is random and not recorded. The intent

of the OTPMK is to be a secret key that is only known to CAAM.

Best regards

igor

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myungjinhwang
Contributor III

Thanks for your reply.

To fuse OTPMK where i should write the values.

is it the OTP_SRK[0~7] ?

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igorpadykov
NXP TechSupport
NXP TechSupport

HI MyungJin

no this is not OTP_SRK, please create service request.

Best regards

igor

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myungjinhwang
Contributor III

Thank you...

you mean OTP_SRKn is different with OTPMK right?

and i don't understand "create service request".

what is it? could you explain it more detailed?

Best regards

MyungJin Hwang

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igorpadykov
NXP TechSupport
NXP TechSupport

please login to freescale.com then enter service request

1.jpg

I will send you address OTPMK.

~igor

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myungjinhwang
Contributor III

It's the Service Request number 1-4138548724

and could i read the OTPMK and ZMK values directly? or it's to be a secret key that is only known to CAAM ?

thank you for your support.

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