Difference between revisions of "MMC/SD"

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For instructions on how to use MMC/SD on Linux, see [[MultiMediaCard]] page.
 
For instructions on how to use MMC/SD on Linux, see [[MultiMediaCard]] page.
  
== Adapter board ==
+
== Adapter board (for DevLight ou your custom board) ==
 
We have designed a small adapter board with a push-pull MMC/SD connector on it.
 
We have designed a small adapter board with a push-pull MMC/SD connector on it.
 
You need to connect the signals listed in the table below to the corresponding one on your DevLight board.
 
You need to connect the signals listed in the table below to the corresponding one on your DevLight board.

Revision as of 11:22, 28 July 2007

How-To connect an MMC/SD adapter to the APF9328 (through DevLight board)

For instructions on how to use MMC/SD on Linux, see MultiMediaCard page.

Adapter board (for DevLight ou your custom board)

We have designed a small adapter board with a push-pull MMC/SD connector on it. You need to connect the signals listed in the table below to the corresponding one on your DevLight board. The WP and CD_SW signals are optional and must be connected to free i.MXL GPIOs, if used.

Top view, connector on the left
Signals name (Top view with MMC connector on the right):
MMC Adapt pinout.jpg
Adapter Pin Desc Adapter Pin Desc
1 (square) +3.3V 2 SD_DAT2
3 SD_CMD 4 SD_DAT3
5 SD_CLK 6 SD_DAT0
7 WP (option) 8 SD_DAT1
9 CD_SW (option) 10 GND

Remarks:

  • Pin 1 (rectangular/square pad)
  • WP: write protect
  • CD_SW: Card Detect switch

If you don't want to buy such an adapter or don't have a MMC slot (and are a hacker ;-) ), you can stil try this link:

Supported Cards

Here is a list of the current cards which were tested:

MMC

  • Hama 256MB -> OK

MMC+

  • Kingston 256MB -> OK

SD:

  • Kingston 512MB -> OK in 1bit mode. need more tests in 4 bits mode
  • Kingston 256MB -> OK
  • Dane-Elec 2GB -> OK in 1bit mode. doesn't work : Card recognized but partition table not found in 4bits mode
  • Transcend 2GB (x150) -> OK
  • Sandisk 512MB -> OK ( formating failure may happen sometimes. workaround: retry )

miniSD:

  • Dane-Elec 1GB -> doesn't work : Card recognized but partition table not found.

uSD/Transflash:

  • Sandisk 512MB -> OK in 1bit mode. recognized but data tranfer is failing when accessing partition table (bad CRC) in 4bits mode


Links


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