Is there such a MCU product exist on the market, which has a unique read-only ID on each chip? Most of today's Flash based MCU can be assigned/programed with a unique ID, but this ID can be erased at chip erase, it can also be copied. 

Currently we only found there are some standalone read-only "ID chip" available from different vendors, I just want to make sure if there are some MCU get this kind of ID feature. 

P.s. We have double check with Microchip MCUs, and confirmed none of the PIC got this feature yet. I am curious if other brand of MCU has this feature? E.g. a 12F508 equipped with such an ID can be identified from any other 12F508s even though they are made on the same day, same lot, even same die.


 Funny N.
Au Group Electronics, http://www.AuElectronics.com
http://www.AuElectronics.com/products
http://augroups.blogspot.com/



      
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