topic About KL43 Unique Identification Register (UID) in Kinetis Microcontrollers

About KL43 Unique Identification Register (UID)

kyohei — Tue, 14 Jun 2022 05:36:02 GMT

Hello,

I'm using multiple KL43 series microcontrollers and trying to identify each one.

KL43 Sub-Family Reference Manual says that these have 96 bits Unique Identification Register (SIM_UIDMH, SIM_UIDML, SIM_UIDL).

Is it correct that these registers have different values for each microcomputer?

ErichStyger — Tue, 14 Jun 2022 06:02:50 GMT

Yes, I'm using it in that way too.

But how that UID is built up is not public afik.

kyohei — Tue, 14 Jun 2022 06:31:17 GMT

Thanks for your replying. You've been very helpful.

By the way, is there any official document that has such a description?

I couldn't find such a description in the reference manual.

ErichStyger — Tue, 14 Jun 2022 06:56:01 GMT

What kind of description are you looking for? The Reference Manual for KL43 describes the registers with its bits.

If you want to see how I'm reading/using the UID, see

McuArmTools_UIDGet()

I hope this helps,

Erich

Robin_Shen — Tue, 14 Jun 2022 07:14:01 GMT

We don't provide information on how the unique ID is generated. We only guarantee that it is unique.