Unique 96bit ID meaning and its shortening

[kinovicf]

Posted on February 08, 2013 at 08:06

Hello.

I have a question concerning processor 96bit UID. I understand that this number is ST unique number and I would like to use it as a board identification in production. But the number is farly long for expressing in text form. So I would like to short it to be unique relative for certain chip.

I see that DFU boatloader uses a shorter serial number similar to UID and it differs among similar chips. Would anybody know the number meaning  or a mask reducing the number to demanded purpose?

Thank you.

#id-unique-meaning-shortening

[Tesla DeLorean]

Posted on September 25, 2013 at 15:42

> duplicated UID.

 

 

Well that id is good for shyte..    Is this something known to happen?

 

At least from the STM32F1 manual, there is very strong emphasis on uniqueness.

 

 

''The 96-bit unique device identifier provides a reference number which is unique for any device and in any context. These bits can never be altered by the user.

 

The 96-bit unique device identifier can also be read in single bytes/half-words/words in different ways and then be concatenated using a custom algorithm.''

It doesn't preclude you or someone else fouling up the implementation, and I'm saying that your test procedures should have enough integrity to catch such things.

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