Difference between revisions of "MMC/SD"
From ArmadeusWiki
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You need to connect the signals listed in the table below to the APF9328DevLight board one. | 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. | The WP and CD_SW signals are optional and must be connected to free IOs if used. | ||
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| + | [[Image:MMC_Adapter.png|thumb|center|]] | ||
Top view: | Top view: | ||
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* WP: write protect | * WP: write protect | ||
* CD_SW: Card Detect switch | * 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:''' | ||
| + | * http://www.hackaday.com/2006/09/12/floppy-connector-mmc-card-slot/ | ||
== Supported Cards == | == Supported Cards == | ||
Revision as of 12:53, 19 June 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.
Contents
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
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
