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Need info about commands for MMC card

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thirunkar

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Sir,
I am doing project on interfacing multimedia card with 8051(AT89s51).I need of clear data sheet about that MMC card particularly about that commands.In that totally there about 48 bits in that command.
1 - star bit
2 - transmission bit .
3:5 - command bit.
next 32 bit was argument
next 7 was crc and the last was end bit.
I have doubt in that command bit in that i have the explation about each and every command but i dont have the code to use in that program , so please can you u help me.
Regading,
Dharun Kumar
 

Re: Regarding MMC card

Hi,

I noted you are using ATMEL chip , I have made the MMC/SD card interface with AVR-DOS for BASCOM, by buying the orginal copy you can get the ASM code. for they you can understand the logic and protocol of interfacing to MMC/SD card.

check out **broken link removed**

Regards
M.Pathma
 

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    thirunkar

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Re: Regarding MMC card

I recommend checking this page for info on MMC.
There are also working examples, even routines for FAT handling, check the resource part of this page.
 

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    thirunkar

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