I'll try to connect an MMC Card.
To connect, i orientated on this post: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1206874649
i've chosen the same resistors.
Now i take a look at the MMC PinOut Map http://www.arduino.cc/playground/Learning/SDMMC
And try to run the files example http://arduino.cc/en/Tutorial/Files
Connecting CS and CLK i got - same name in the example code and in the PinOut Map.
But now i have to find DataIn (MMC Pin 2) and DataOut (MMC Pin 7). The example Code says something like MISO to Arduino Pin 12 and MOSI to Arduino Pin 11. So, ...goes Pin 12 from Arduino to Pin 2 MMC or to MMC 7? (I've tried both, but SerialMonitor said everytime initialize SD Card Filed)
Furthermore, the example Code said, that Pin 10 should be left as an output..!?
It's a bit confusing how to connect the MMC Card...
Or are the SD examples not useable for MMC?