topic MIMXRT1160 Unique ID eFuse in i.MX RT Crossover MCUs

MIMXRT1160 Unique ID eFuse

tbonkers — Mon, 11 Aug 2025 09:08:58 GMT

MIMXRT1160 has a 64-bit Unique ID fuse at 0x900-0x910. Can the value be used as device unique ID, or is it "unique" across processor/batches? If that's the case, is there another pre-programmed register or fuse which can be used as device unique ID?

Thanks

Re: MIMXRT1160 Unique ID eFuse

mayliu1 — Tue, 12 Aug 2025 04:01:40 GMT

Hi @tbonkers ,

Thank you so much for your interest in our products and for using our community.

Yes, IMXRT1160 has a 64-bit Unique ID which configuration by NXP.

Regarding "If that's the case, is there another pre-programmed register or fuse which can be used as device unique ID?"

Could you tell me more details of your requirement? In IMXRT1160 already provide a 64 bit device unique ID fuse at 0x900-0x910.

Best Regards

MayLiu

Re: MIMXRT1160 Unique ID eFuse

tbonkers — Fri, 22 Aug 2025 08:04:51 GMT

Hi,
My requirement is to have an unique ID for each device, and I was thinking that it would be great if I can use the value of the fuse 0x900.
From your response I understand that the value of the fuse is indeed unique for each unit - please correct me if I'm wrong.
Thanks

Re: MIMXRT1160 Unique ID eFuse

mayliu1 — Mon, 25 Aug 2025 08:18:51 GMT

Hi @tbonkers ,

Thanks for your updated information.

Regarding "My requirement is to have an unique ID for each device, and I was thinking that it would be great if I can use the value of the fuse 0x900."

Are you saying that you used the value of fuse 0x900, a 32-bit data? If so, I don't think that's a good choice, 32-bit data is not unique .

But if you use the fuse values 0x900 and 0x910, the 64-bit data is unique (unique ID), which would be Okay.

Wish it helps you.

Best Regards
MayLiu