Lpc2000

Lewin A.R.W. Edwards wrote:
> On this topic... if you're implementing MMC please go the whole hog and 
> put an SD slot on it instead. I know most people don't have access to 
> sufficient documentation to use it, but the connector costs about the 
> same and it's a more future-proof design.

I've just found some information about talking to SD cards:

http://www.sdcard.org/sdphysical_simplifyed_Ver101.PDF

Includes such neat information as:

1) They can be accessed via SPI, MMC, or SD protocols

2) SD protocol is just MMC protocol but with 4 data lines instead of 1. 
The card, on power up, figures out if it's being spoken to in SPI or 
MMC. If in MMC, then you can (1 bit at a time) then ask it to switch to 
SD mode and use a wider bus.

ABS