MMC/SD: Difference between revisions
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How-To connect an MMC/SD adapter to | How-To connect an MMC/SD adapter/connector to your APF9328 | ||
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.<br> | ||
'''SDCard, MiniSD, and Transflash/MicroSD are all the same devices but in different package shapes and are all pin compatible.''' <br> | |||
On Armadeus boards, MMC are controlled in 1 bit MMC mode and SD/MiniSD/MicroSD in 4 bits SD mode. | |||
We don't use MMC/SD in "fucking slow & error prone" SPI mode. | |||
== Adapter board (for DevLight | == Adapter board (for DevLight or 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. | ||
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* 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 | '''If you don't want to buy such an adapter or don't have a MMC slot (and are a hacker ;-) ), you can still try this link:''' | ||
* http://www.hackaday.com/2006/09/12/floppy-connector-mmc-card-slot/ | * http://www.hackaday.com/2006/09/12/floppy-connector-mmc-card-slot/ | ||
== On a DevFull board, there is already a MMC/SD connector == | |||
== Supported Cards == | == Supported Cards == | ||
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* Sandisk 512MB -> OK ( formating failure may happen sometimes. workaround: retry ) | * Sandisk 512MB -> OK ( formating failure may happen sometimes. workaround: retry ) | ||
=== | ===MiniSD:=== | ||
* Dane-Elec 1GB -> doesn't work : Card recognized but partition table not found. | * Dane-Elec 1GB -> doesn't work : Card recognized but partition table not found. | ||
Revision as of 12:34, 28 July 2007
How-To connect an MMC/SD adapter/connector to your APF9328
For instructions on how to use MMC/SD on Linux, see MultiMediaCard page.
SDCard, MiniSD, and Transflash/MicroSD are all the same devices but in different package shapes and are all pin compatible.
On Armadeus boards, MMC are controlled in 1 bit MMC mode and SD/MiniSD/MicroSD in 4 bits SD mode.
We don't use MMC/SD in "fucking slow & error prone" SPI mode.
Adapter board (for DevLight or 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.
Signals name (Top view with MMC connector on the right):
| 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 still try this link:
On a DevFull board, there is already a MMC/SD connector
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
