Lpc2000

Lewin A.R.W. Edwards wrote:
>>Off Topic, but is there any example source of showing how to talk to an
>>SD memory card out there anywhere?  I know you have to pay to get the
> 
> 
> You can talk to SD using MMC fallback mode. However, this mode doesn't 
> let you use the (BS!) DRM features built into the spec. That's the 
> secret part. Depending on the appliance that wrote the card, you may or 
> may not be able to access already-written data.

According to the doc I found, you just need to set a flag somewhere from 
MMC mode to make it go into 4-bit SD mode; apart from the changed 
electrical stuff, the logical interface remains the same. I've only 
skimmed through the PDF but it looked like you might have enough info 
there to access an SD card in 4-bit wide mode as a FLASH device. It 
*looks* as if the only thing that goes in the protected region is a 
crypto key for the DRM-protected file...

Anyway - any links to documentation anyone has on MMC or SD - please 
send it to me to put on the Wiki, unless you fancy adding it yourself!

ABS