My memory fade off a bit but is not Microchip had some sort of
pre-programming service with serial numbers? As far as I remember it was
tight with OTP chips, so that you cannot modify the content afterwards.

Tamas


On Tue, Sep 29, 2009 at 12:40 PM, Funny NYPD <funnynypd@yahoo.com> wrote:

> The unique read-only ID can be used for many functions. For instance, it
> can be used to identify each MCU, each individual products, etc.
>
>  Funny N.
> Au Group Electronics, http://www.AuElectronics.com
> http://www.AuElectronics.com/products
> http://augroups.blogspot.com/
>
>
>
>
> ________________________________
> From: Vitaliy <piclist@maksimov.org>
> To: Microcontroller discussion list - Public. <piclist@mit.edu>
> Sent: Monday, September 28, 2009 10:09:58 PM
> Subject: Re: [EE]MCU with unique read-only ID?
>
> Funny NYPD wrote:
> > 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.
> >
>
> Why do you need this functionality?
>
> Vitaliy
>
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