SD card Host using the ST7265x Family

[urik]

Posted on September 08, 2004 at 02:40

SD card Host using the ST7265x Family

[urik]

Posted on September 06, 2004 at 03:27

Hello to all,

i want to implement SD card Host using the ST7265x Family, can it be done? according to the samples and the eval board i see that only USB to SD is supported, what about the file system? is there a code to implement it (maybe all ready made by ST guys?), what is the code provided with the MCU? and is the a way the get a look at it before so i could make an educated guess on how long will it take to develop it? hope to hear from you soon, Best Regards, Uri.

[juhee]

Posted on September 06, 2004 at 11:05

The ST7265 provides an interface between USB host (Computer with Windows or MAC OS) and the Flash cards(SD/SMC/ etc...)

As the Read/Write are managed through standard USB host with Mass Storage drivers, the file system is manged by the computer it self. ST7265x just receives the data from the computer and writes it on to the card. ST does not provide a firmware to use the St7265 as a stand-alone host for SD card. But the file system management can be implemented in the ST7 code. To get access to the source code you need to contact the Area sales person of ST and the Firmware after signing an NDA. Also you can go to download section to get access to the Application notes availaible on MAss Storage Application. This will help. PS- For request related to USB devices or USB based reference Designs please put your question in USB forum

[urik]

Posted on September 06, 2004 at 11:25

Thank you for you replay,

do you know a good source to begin implementing the file system? or a document that describes a flash file system similar to the FAT32? Best regards, Uri.

[juhee]

Posted on September 06, 2004 at 12:02

The FAT32 specification availaible on Microsoft site.

Also you can refer to Logical Format specifiaction of Smart Media Card (A type of Flash Card). This would be availaible on www.ssfdc.or.jp

[alok2]

Posted on September 08, 2004 at 02:40

For SD card interface you have to decide if the implementation is to be done in SPI mode or MMC mode.

The 5in1 card reader firmware contains support for MMC mode of SD card. this is implemented on 7265x, which has inbuilt DTC (data transfer co-processor). Single page Read/Write is also available in the package but FAT is to be implemented. As JMIND said, you need to contact area-sales..