MMC/SD memory cards for Atmel AVR

Code

This project is in alpha. You can download the first snapshot here: MMC_V001.zip
For more details see: readme.txt

Pictures

These are Compact Flash, Secure Digital and Multi Media Card next to each other. Under SD and MMC you can see their sockets.
cards_sockets

And these are the back sides of MMC and SD. You can see SD has two more contacts than MMC and a write protect switch.
back_side

Before I had real sockets I used a PCB connector. This only works for MMC, but not for SD. This prototype interfaces a 3.3V MMC to a 5V AVR.
PCB_socket

The SD sockets are SMD, but as the pin distance is 0.1" it's relatively easy to put them on a prototype board. This interfaces to a STK500 running with 3.3V directly.
SD_socket

And here are the back sides of the MMC and SD sockets. Note that MMCs fit into SD sockets, but not the other way around.
socket_back

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