Lpc2000

Richard,

I am assuming you are not referring to the bytes that comprise the
reserved vector that is used as checksum for the boot loader.

If no matter what you write to a bit location (a given bit at a given
location) it always reads as a one (or zero) then you have stuck bits
in flash.  Solution: replace your part.

If the error is temporal meaning a given bit location only sometimes
does not reflect what is written, then you may have a timing problem.

Solution: if your boot loader is not the latest one, update to the
latest one; if it is, replace your part.

Do not worry about ECC, or number of bytes written as these are taken
care of at the flash controller and boot loader levels, respectively.

Jaya 

--- In lpc2000@yahoogroups.com, Richard Duits <yahoo@r...> wrote:
>
> Hi,
> 
> When updating a sector that already contains data, I noticed that with 
> some data the update writes the wrong data. I found this when updating 
> the first 4 bytes of the 2nd sector. Through my supplier in the 
> Netherlands I have a support request that was forwarded to the LPC2000 
> development team in the USA about 3 weeks ago. I get very little 
> feedback on the status of my support request, so I don't even know if 
> they have been able to reproduce the error.
> 
> Richard Duits