Boot MMC/eMMC on SABREAUTO Board

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Boot MMC/eMMC on SABREAUTO Board

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Contributor II

Hello, All

I'm beginner about imx6 processor.  Checking functions with the SABREAUTO RDK board.

I was getting started with i.MX_Yocto_Project_User's_Guide.pdf inside of  imx-yocto-L4.14.98_2.0.0_ga.tar.gz.

It worked everything - built a sdcard image with yocto, write it to sdcard with mfgtool and boot with sdcard.

The SABREAUTO RDK board has not the MMC chip, only it has the sdcard slot.

Custom board is not ready, it has a eMMC chip.

Check to select the MMC mode of boot options with the sdcard, before the board comes out.

I think it could boot a MMC mode with sdcard, but it didn't shows any messages on the serial port.

SDcard Boot: BOOT_CFG1 = 0100_1000b, BOOT_CFG2 = 0011_0010b

MMC Boot: BOOT_CFG1 = 0110_1000b, BOOT_CFG2 = 0011_0010b

The options are almost the same, changed a MMC mode.

  • Fast Boot is Regular, MMC Speed is Normal.
  • Bus Width is 4bit, Port select is uSDHC3, Boot ROM default, Boot Ack Disable.

Please let me advice about it.

Thanks.

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3 Replies

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Contributor II

Finally, Come our custom board out with eMMC chip.

It works well, just set to MMC boot mode. SD3 interface changed a SD-Card slot to eMMC chip and bus-width are 8.

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NXP TechSupport
NXP TechSupport

Hello Hyun,

The port select is uSDH3, this goes to normal SD/EMMC, We don´t know which port you should include because the SABRE board does not have to, but it looks correct.

Regards

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7 Views
Contributor II

Hi, Bio

Sorry too late.

The SABREAUTO board connected uSDH3 port which it is a SD/MMC-card slot.

I would like to check the MMC boot mode with this port which it is inserted SD/MMC-card.

Wait for a custom board to come it out. It must check with an EMMC chip.

Is it right ?

Regards

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