OMAP L138 eMMC support ?

Maxime Renaudet

Hi,

I've been trying to use an eMMC on my custom board with OMAP L138. There is already an SD-Card working but I can't get the eMMC to work.

I followed the initialization sequence for MMC, but the card respond always busy to the OCR_CMD (CMD1). The OCR I receive is 0x00FF8080. So the card does respond but never set the "busy bit" (bit 31 on OCR).

Does anyone know why this happens ? Any tips ?

Thanks for your help.

over 13 years ago

0 Renjith Thomas over 13 years ago

Guru 31670 points

Maxime,

Can you share more details about the eMMC used and the interface? Are you sending CMD1 as the first command? I believe you've to send a CMD0 to reset the device to idle state first.

0 Damien Baumann over 10 years ago

Prodigy 20 points

Hi Maxime,
I know this is an old post, but I'm facing exactly the same issue with my custom board. I am trying to find a solution since one month but without any success. Have you find the reason any y our emmc stays busy? Thanks in advance for your help!!!
Damien

0 Titusrathinaraj Stalin over 10 years ago in reply to Damien Baumann

TI__Guru** 116100 points

Dear Damien,
Can you please create a new post for your problem with detailed ?

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OMAP L138 eMMC support ?