Silicon generated serial number

[Anonymous]

Reading the data sheet for the USBFS component suggests that the PSoC Creator will eventually have a feature for supplying the USB device serial number with a "Silicon Generated Serial Number." I understand from the PSoC Creator errata that this feature is not yet implemented.

   

Does that mean that the PSoC hardware includes some sort of read-only unique-per-chip serial number? If so, could you briefly describe how to access it? I have need of such a serial number and was considering adding another chip to my design which functions as a silicon serial number (a DS2401), but obviously I would prefer not to do that if there is already such a number available somewhere.

   

A quick search of the PSoC 3/5 Registers TRM (for the word "serial") didn't turn up anything, but it's an 1800 page document.

[Anonymous]

Doug,

   
   

could you point me to the specific document  and paragraph that triggered this post?

   

Currently there is no silicon generated serial number in a PSoC device. Have you considered to use a company-wide pool of serial numbers that have to be requested at time of programming and then program the serial number in the NV-memory on the PSoC?

   

I am aware that it is more convenient to get a unique number to begin with, not having to care about the logistics behind it but we are not able to offer this feature.

   

BR, Robert

[Anonymous]

Yeah, I was wondering how you planned to do it...

   

Here's a screenshot of the PSoC Creator dialog for configuring the USBFS component: http://imageshack.us/photo/my-images/819/dialogr.png/

   

See also page 11 of the datasheet for the USBFS component version 1.60

[Anonymous]

Doug,

   

Thank you for the reference, I did some digging too. What I learned is that there is indeed a serial number in the chip but under some circumstances it could re-appear in another device. There is a roll-over mechanism.

   

I forwarded your question and will keep you posted if such a feature becomes available (fully documented).

   

Robert