If SDMMC3 support eMMC HS200!?

[FrankPCP]

Hi All,
We would like to use SDMMC3 to connect with an eMMC. Can the SDMMC3 supprt eMMC HS200!?

[Trumany]

Hi, only SD card or SDIO is supported on SDMMC3.

[Tonie]

Hi, Trumany,

Do you mean we cannot add extra eMMC via Pin SDMMC_XXX ?
Pin 219/221/223/225/227/229 of NANO .

[Trumany]

Yes, as you can see in the Design Guide, only SD card and SDIO is supported.

[Tonie]

Hi, Trumany,

As Design Guide mentions, SDIO’s max Frequency can be up to SDR104 (208 MHz) within 1.8V signaling.
And the storage size of on-board eMMC is way too small, our customer asks to have extra one within high speed eMMC.
Could you please advise how we can achieve it ?

[Trumany]

eMMC is not supported. You may consider to use SD card or SSD.

[FrankPCP]

Hi All,
In TX1 TRM, sdmmc3 connects with BDSDMEM_B pad while sdmmc4 connects with BDEMMC_IOBRICK_BFC pad.

Is there any difference between BDSDMEM_B and BDEMMC_IOBRICK_BFC which will make sdmmc3 couldn’t support eMMC!?

If not, can I say we only need to modify driver or devicetree to make sdmmc3 support eMMC!?

[Trumany]

No, as you can see in it, only SD card or SDIO device for SDMMC3.

[FrankPCP]

Hi Trumani,
Ok, I understand and agree with you.
I’m still curious about the difference between the BDSDMEM_B and BDEMMC_IOBRICK_BFC pads.
Do you know the difference between them! ?

[Trumany]

BDEMMC_IOBRICK_BFC pads are to meet timing requirement of eMMC.