topic Re: MCUX SPT FUSE resetting in MCUXpresso Secure Provisioning Tool

MCUX SPT FUSE resetting

Seongyon_Jeong — Mon, 07 Jul 2025 05:53:17 GMT

If ...I press Yes on these two windows, I've been working on it.
By the way, if I deleted the workspace , in other words, If I forgot the Key.

then will I not be able to use the board? Is it impossible to recover?

and,
In the [open,HAB disabled] state next to the [LC] in the toolbar
Even if you press the above two window pop-up yes. Is there any problem? in other words, in spite of Click yes, Fuse is not burned right?

It is a little different from the guide document on the homepage in the latest version 25.3.01.
I think NXP need to update the guide document and guide video

Re: MCUX SPT FUSE resetting

liborukropec — Mon, 07 Jul 2025 17:18:29 GMT

Hi,

By the way, if I deleted the workspace , in other words, If I forgot the Key.

then will I not be able to use the board? Is it impossible to recover?

No, you can't recover -once you burn the key, you should backup your keys.

Even if you press the above two window pop-up yes. Is there any problem?

What problem do you mean? You are told you do an operation you cannot reverse. E.g. in the first dialog you configure the encryption.

In the second dialog you write the Hash of the keys you have on your disc. As mentioned above, you should not lost the keys. You cannot recover or re-generate the same keys with the same hash.

Fuse is not burned right?

The fuses are burnt as the dialog title says with capital letters if you click Yes.

It is a little different from the guide document on the homepage in the latest version 25.3.01.

Where exactly? Please note that basec on your configuration different number of fuses will be burned, so the documentation just show screenshots for described use-case. In different scenario (e.g. with/without encryption) the list of fuses will be different.

Regards,

Libor

Re: MCUX SPT FUSE resetting

Seongyon_Jeong — Tue, 08 Jul 2025 00:45:57 GMT

Oh..my.. I realize now that my comment was too brief , short

It is a little different from the guide document on the homepage in the latest version 25.3.01.
=> this is not about upper fuse burning comment.

I was referring to a difference I noticed between the guide document on the homepage and the 25.3.01 version of the tool.

The video guide only introduces 3 modes:
– unsigned, signed, and encrypt+signed.

But the actual tool UI shows 6 modes:
– unsigned, authenticated (signed HAB), encrypt+signed,
– XIP BEE with OTPMK,
– XIP BEE with user data (unsigned),
– XIP BEE with user data (signed).

Also, in the document, I couldn’t find any mention of “LC” mode or the “Open, HAB disabled” status that appears in the tool.

Frankly speaking, my progress is currently blocked while working with the XIP BEE user data unsigned/signed mode.

So, I would have liked to watch a video specifically covering that mode.

Overall, I understand that this is a minor difference, and that since the software keeps getting updated, there could be some slight changes. and could not cover all

However, my development progress is currently blocked, and I'm reviewing everything to see if the cause might be hidden in those slight differences — or perhaps in something I’ve misunderstood.
That’s why I left the comment: "I think NXP need to update the guide document and guide video"

Anyway, I’ll close this page now. I’ll make sure to be more cautious when burning fuses in the future.