Kinston MMc card and AT89S8252

I am trying to interface Kingston MMC card 256MB with AT89S8252/S53 microcontroller in SPI mode using SPI port in

MODE 0. I used 74LVTH244 for level conversion from 5 volt to 3.3 volt for MMC I/o.


I send CMD 0, CMD1 & CMD 16 . I found proper & desired response from MMC side according to standard. Then i try to

read CID & CSD registers. Then after issue command there was no data tonen i.e. 0xFE. I commnect this step then i

found Kingston MMC card give with packes with header of 0xFFFFFC at both packets.


After when itry to Write a sector , MMC give me proper responce after issue commnad. But fater write a sector it

does not give me any vaild /invaild acknoledgement .

Similerly when i tried to read a sector then it didnot give me a proper data token.

I am sorry, i can't help you
but i want to know, (as i am also doing also a project involving mmc card) , but i am unable to know how to interface MMC card.
I have also read complete Hitachi MMc card data sheet, but unable to know how to read/write the MMC card.
e.g. as you have mentioned CMD0 or CMD 17 is used but how it is written in programing langhuage?

I haope you understand my question
Umer