MMC/SD

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Revision as of 12:32, 20 February 2007 by JulienB (Talk | contribs) (uSD/Transflash:)

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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

We have designed a small adapter board with an MMC/SD connector on it. You need to connect the signals listed in the table below to the APF9328DevLight board one. The WP and CD_SW signals are optional and must be connected to free IOs if used.

Top view:

Adapter Pin Desc Adapter Pin Desc
1 +3.3V 2 SD_DAT2
3 SD_CMD 4 SD_DAT3
5 SD_CLK 6 SD_DAT0
7 WP 8 SD_DAT1
9 CD_SW 10 GND

Remarks:

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

Supported Cards

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

MMC

  • Hama 256MB -> OK

MMC+

  • Kingston 256MB -> OK

SD:

  • Kingston 512MB -> need more perf tests but seems to work
  • Kingston 256MB -> OK
  • Dane-Elec 2GB -> doesn't work : Card recognized but partition table not found.
  • Transcend 2GB (x150) -> OK

miniSD:

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

uSD/Transflash:

  • Sandisk 512MB -> recognized but data tranfer is failing when accessing partition table (bad CRC)


Links


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