MMC read error

Hi,

I have configured INAND SD card on MMC2, and I notice that I am not
able to configure for high speed. I am able to access the card at 1
MHz but not able to communicate with the card at 48MHz. Can anyone
please offer any suggestions?

Thanks
Praveen

Praveen,

See if this helps you .

HOST has to enable the high speed mode timing, before changing the clock frequency to a frequency higher than 20MHz.For the host to change to a higher clock frequency, it has to enable the high speed interface timing, need to write write 0x01 to the HS_TIMING byte, in the Modes segment of the EXT_CSD register.

Regards,
Shankar

Hi Shankar,

Thanks, I will look into that. It looks like my code is not getting
into the high speed mode.

Praveen