eMMC over GPMC on AM437x EVM

Manan Patel1

Intellectual 390 points

Hi,

Is the eMMC on AM437x functional? How do I enable in u-boot and test it?

Also, a couple of forum posts recommend interfacing eMMC to MMC2 and not GPMC. Is software the reason for this?

Thanks,

Manan.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi Manan,

eMMC is a block device. It behaves exactly like an MMC card. eMMC should be connected to one of the MMC ports of the processor. There is no eMMC support over GPMC.

0 Manan Patel1 over 10 years ago in reply to Biser Gatchev-XID

Intellectual 390 points

Thanks Biser,

I don't understand what the eMMC device is in the AM437x EVM schematic on page 5. It seems to be connected to the GPMC.

0 Biser Gatchev-XID over 10 years ago in reply to Manan Patel1

TI__Guru**** 393215 points

If you look at the AM437X Datasheet you will see that GPMC_AD[7:0] are pinmuxed with MMC1_DATA [7:0]. There are also two additional interface signals to the eMMC: MMC1_CLK and MMC1_CMD (nets are named as AM437X_CSN1 and AM437X_CSN2).

0 Manan Patel1 over 10 years ago in reply to Biser Gatchev-XID

Intellectual 390 points

Thanks Biser!

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eMMC over GPMC on AM437x EVM