i.MX6ULL read and write fusemap

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i.MX6ULL read and write fusemap

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mannsikchung
Contributor III

Dear All.

The addresses of fusemap are 0x400, ...., 0x450, 0x460, 0x470, 0x6D0, etc.

And, only part of 0x450 is accessable by H/W BOOT_CFG pins.

How to access 0x430[21:20] from software or bootloader?

"md" command of u-boot is usable?

I want to read current setting of 0x430[21:20], TAMPER_PIN_DISABLE.

And, I want to change 0x430[21:20]. How can I change it?

BR.

Mannsik

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keyur-mpc
Contributor I

Have you found the solution?

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brenolima
NXP Employee
NXP Employee

Hi mannsikchung‌,

You can use the fuse API in u-boot for reading and writing:

=> fuse read <bank> <word> [<cnt>]
=> fuse prog [-y] <bank> <word> <hexval>

You can find more details about it and a example in the following link: Burning eFuses on i.MX6 and i.MX7 - i.MXDev Blog 

Thanks,

Breno Lima

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art
NXP Employee
NXP Employee

What exactly i.MX series processor do you mean? Please specify it first.

Best Regards,

Artur

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mannsikchung
Contributor III

As the title says, I'm using i.MX6ULL.

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