Lpc2000

--- In lpc2000@yahoogroups.com, "Pandurang Shinde" <pandurang@...> wrote:
>
> thanks Peter for reply, on the chip it is printed as 
>                                                                    
     LPC2136FBD64
>                                                                    
     S60735.1        04
>                                                                    
     ZPG0602B
>  
>                       So i am concludung that is LPC2136 only ,but
reading LPC2131.
>                       Why this happen.
>                       Can u suggest any solution for it.       
>  
> Regards,
> Pandurang S.
> 

It is fairly common to "bin" parts during prepackaging testing, so
that chips that have failed some part of the testing can still be
used.  If a segment of memory fails in testing the part can simply be
downgraded to the next smaller memory specification and sold at a
reduced price. In other kinds of ASIC chips that is usually done as a
bond out option, but in this case it was apparently done when the boot
loader was programmed prior to packaging. Since the tests are
performed prior to packaging, it is possible that the chips you have
were simply mispackaged if you only have a very small quantity of
chips exibiting the problem that you describe. If you can, it would
probably be good if you could return the chips to your distributor for
replacement. That way, Phillips would be able to verify the problem
and possibly eliminate future occurances. In other words, it is fairly
likely that you have an LPC2131 silicon in a LPC2136 package.

That's just my guess!
-- Dave