Lpc2000

As a more definitive answer:

The latest SanDisk product manuals can be found here:

http://www.sandisk.com/Oem/Manuals/

Note the latest RS/MMC manual has no mention of wear levelling, but does 
mention the automatic bad sector remapping.  The latest CF and SD documents 
explicity state that wear levelling is not required, but implemented as a 
NOP command for backwards compatibility.  However other manufacturers may 
actually implement the command, assumedly if their # of write cycles 
supported is low.

You may also find this interesting:

http://www.sandisk.com/Assets/File/OEM/ApplicationNotes/MultiMediaCard/AppNoteMMCQAv1.0.pdf

So basically the decision is up to you as to wether or not you want to 
implement your own wear levelling, however unless you're really hammering 
the flash I'd think it's not necessary. YMMV.

-- Sean



At 09:33 PM 1/4/2006, you wrote:
>I read the application note, I have just a question:
>- SD and MMC implement a wear level mechanism or have I to provide a
>wear leveling algorithm by myself?
>Best regards.