Unique Identification Register

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Unique Identification Register

825 Views
nexcode
Contributor II

Hi,

I'D like to Know how to use the "Unique Identification Register" that are present on Kinetis K64, for an automated generate a MAC Address. since that some informations inside, since no informations about the content are described.

Have I to sign a NDA ?

Best Regards

Rodrigo F. Campello

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5 Replies

475 Views
mjbcswitzerland
Specialist V

Hi Rodrigo

Please see the rules about use of MAC addresses her: http://www.utasker.com/forum/index.php?topic=21.msg68#msg68

Regards

Mark

475 Views
bobpaddock
Senior Contributor III

"There are a few chips which are supplied with a predefined unique MAC address. These MACs belong to the chip manufacturer and you pay a small fee (included in the chip price) for them. But this is very much the exception and, although I did look at one a while back, I can't think of one to reference at this moment...."

MAC Address & Unique ID EEPROMS | Microchip Technology 



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475 Views
victorjimenez
NXP TechSupport
NXP TechSupport

Hello Rodrigo F. Campello

 

The Unique ID is programmed during manufactory and the algorithm to generate. The algorithm cannot be shared. If you get some chips and read out these UID registers, you can find there is no abvious regularity between them. I am sorry for the inconvenience. Thanks a lot for your understanding.

Hope it helps!

Victor.

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475 Views
m4l490n
Contributor V

victorjimenez

I have a question about the Unique ID.

I'm working with a K10 MCU and it has 128 bits as the ID. My question is, are these 128 bits unique across all existing chips? Or does the ID have bytes that don't change? I ask because I'm working on a project that generates a MAC address from parts of this ID and I have found that on several occasions I'm getting duplicate MAC Ids. I'm not using all 128 bits of the number but I think I'm using the ones that don't change, if any.

Could you please confirm this?

Thanks!

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475 Views
victorjimenez
NXP TechSupport
NXP TechSupport

Hello Manuel,

The Unique ID number must be used with the complete 128-bit number; we cannot assume that the LSB/MSB part is going to be unique.

Regards,

Victor.