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AM6442: Inquiry regarding eMMC Boot Partition size limitation on AM6442 and partitioning strategy

Jack
Guru 10016 points

Part Number: AM6442

Dear TI Support Team,

I am currently working on an embedded design using the AM6442 processor interfaced with an ISSI eMMC (IS22TF16G).

I have a question regarding the eMMC boot partition configuration. The current hardware part has a fixed boot partition size of 4MB (as per the specification in the attached image).

However, my combined boot image (Bootloader + Kernel image) exceeds this 4MB limit, reaching approximately 8MB. I would like to clarify the following:

  1. Partitioning Restriction: Is it correct that the 4MB physical Boot Area Partition cannot be extended via software partitioning tools (such as FDISK) and is strictly limited by the hardware configuration?

  2. Recommended Boot Sequence: Given this 4MB hardware constraint, what is the recommended practice for booting the AM6442? Should I split the boot components, placing only the SPL/MLO in the boot partition and loading the full U-Boot/Kernel from the User Data Area?

Could you please confirm if my understanding is correct or provide guidance on the standard implementation for this scenario?

Best regards,
Jack Cha