Problem in reading/writing SD card through MPC5554 using SPI clock speed above 3 MHz

Status
Not open for further replies.

sanaas

New Member
Hi everybody,

I have interfaced a 4 GB class 4 Kingston micro SD card with MPC5554 using SPI. I have implemented FAT32 file system driver on it.
Everything(reading/writing files) works fine when I keep SPI clock at 3 MHz after initialization. With 3 MHz clock I am able to write 1 MB of data in a file in 1 min which is pretty low speed!!
But when I turn to SPI clock above 3 MHz, the SD card does not read/write sectors at all!! All I want to do is to increase this speed of data transfer.
Has any body done such a thing with speed higher than 3 MHz? I would be so grateful if any body could help me in this issue as I have been trying to solve it since last so many days but no results and my FAT32 driver would be of no use in my application with such a low speed. Please do help me.

Thanks,
Sana
 
Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…