AM3358: Need suggestion for connecting Micro-SD card to MMC2 for custom design.

kasturi S

Part Number: AM3358

Hello,

For our custom design we are planning to connect Micro-SD card to MMC2. And as per Technical Reference manual pg.no 5031 boot sequence, it is not mentioned for MMC2.

Kindly suggest us.

Thanks,

Kasturi.

over 2 years ago

0 peaves over 2 years ago

TI__Guru 63155 points

Using MMC2 is not a valid boot option. See the following information taken from the TRM.

• MMC/SD Cards compliant to the Multimedia Card System Specification and Secure Digital I/O Card Specification of low and high capacities.
• MMC/SD cards connected to MMC0 or MMC1.

• MMC0 supports booting from the MMC/SD card cage and also supports booting from eMMC/eSD/managed NAND memory devices with less than 4GB capacity.
• MMC1 supports booting from eMMC/eSD/managed NAND memory device with 4GB capacity or greater.

Regards,
Paul

0 kasturi S over 2 years ago in reply to peaves

Prodigy 50 points

Thank you for the quick response Paul,

We are connecting 4GB eMMC to MMC0, so is it possible to partition it into 2GB blocks and use it for booting?

0 peaves over 2 years ago in reply to kasturi S

TI__Guru 63155 points

This is a completely different software related question that should have been asked on a new thread, so it gets assigned to the appropriate software team.

What software are you using so I know how to assign.

Regards,
Paul

0 kasturi S over 2 years ago in reply to peaves

Prodigy 50 points

We are using Linux OS, with Yocto build system.

Thanks,

Kasturi

0 Bin Liu over 2 years ago in reply to kasturi S

TI__Guru**** 169991 points

Hi Kasturi,

kasturi S said:
We are connecting 4GB eMMC to MMC0, so is it possible to partition it into 2GB blocks and use it for booting?

Yes, if 2GB eMMC has enough room to host all your Linux filesystem.

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AM3358: Need suggestion for connecting Micro-SD card to MMC2 for custom design.