Can NX expand eMMC from SDIO on design board

Hi Nvidias,

Can I expand eMMC from NX SDIO,If NX support expand eMMC,Is There have support eMMC part list.

Hi Nvidias,

How to enable 64G eMMC expand over SDIO.

Moving this to the Jetson NX forum.

It is not supported.

@Trumany @TomK
to make sure, eMMC expand over NX SDIO is not supported?
the only way is to use SD Card?


No, it is not supported by now.


Hi, Trumany
Ask in detail, is the hardware not supported, or is the software not supported well?

I’m testing samsung emmc - ‘KLM8G1GETF-B041 8GB’ through sdhci@3440000,
With limmiting the bus speed mode not as hs200/hs400, the emmc can be detected:

[11521.042061] mmc_select_card_type: avail_type = 0x7
[11521.046640] mmc1: new DDR MMC card at address 0001
[11521.047671] mmcblk1: mmc1:0001 8GTF4R 7.28 GiB 
[11521.048080] mmcblk1boot0: mmc1:0001 8GTF4R partition 1 4.00 MiB
[11521.052645] mmcblk1boot1: mmc1:0001 8GTF4R partition 2 4.00 MiB
[11521.052882] mmcblk1rpmb: mmc1:0001 8GTF4R partition 3 512 KiB

but it doesn’t work:

[11521.053531] mmc1: Data CRC error
[11521.053636] sdhci: =========== REGISTER DUMP (mmc1)===========
[11521.053752] sdhci: Sys addr: 0x00000008 | Version:  0x00000505
[11521.053856] sdhci: Blk size: 0x00007200 | Blk cnt:  0x00000007
[11521.053971] sdhci: Argument: 0x00000000 | Trn mode: 0x0000003b
[11521.054080] sdhci: Present:  0x010b0000 | Host ctl: 0x00000017
[11521.054190] sdhci: Power:    0x0000000f | Blk gap:  0x00000000
[11521.054301] sdhci: Wake-up:  0x00000000 | Clock:    0x00000107
[11521.054428] sdhci: Timeout:  0x00000008 | Int stat: 0x00000000
[11521.054542] sdhci: Int enab: 0x02ff008b | Sig enab: 0x02fc008b
[11521.054644] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[11521.054760] sdhci: Caps:     0x3f6cd08c | Caps_1:   0x18002f77
[11521.054875] sdhci: Cmd:      0x0000123a | Max curr: 0x00000000
[11521.055282] sdhci: Host ctl2: 0x0000300c
[11521.055591] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000ffefe410
[11521.056084] sdhci: ===========================================
mmcblk1: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

Does it seem whether the hardware is support?

It’s not been validated. Please follow the datasheet and not to implement such design.