Lpc2000

Micron Engineering 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?
>  
>
Depends on whether you purchase the cheapest, "house brand", device or 
spend the money for a Sandisk / Lexmark.

IIRC, Sandisk includes the wear leveling.  From page 1-3 of the SanDisk 
document #80-36-00320:

"1.8 Defect and Error Management
... In the rare case that a bit is found to be defective, the cards 
replace it with a spare bit within the sector header.  If necessary, the 
card will replace the entire sector with a spare sector ..."

As they say: RTFM, Read The Fine Manual.


TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------