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AM3352: ARM board can't boot using new SkyHigh Memory S34ML01G3 (3rd Generation Flash memory).

Everett Sykes1
Prodigy 50 points
Part Number: AM3352

Hello,

BACKGROUND:
My name is Everett Sykes. I'm a design engineer for Western Telematic, Inc. We build a series of products that contain a CPU board using the "AM3352 ARM Cortex-A8 MPU" processor. This CPU board is roughly based on the BeagleBone Black board.

TECHNICAL DETAILS:
Processor:
AM3352 ARM Cortex-A8 MPU
Processor boot order (Where the processor looks for the SPL/u-boot/kernel image):
   1. Internal Flash
   2. SD card
   3. Serial console port
u-boot version:
   u-boot-2013.10-ti2013.12.01
Linux kernel version:
   5.4.0

PROBLEM:
We've previously used Spansion S34ML01G2 and SkyHigh Memory S34ML01G2 (2ND Generation Flash memory), and everything works fine. We built a batch of boards using the SkyHigh Memory S34ML01G3 (3rd Generation flash memory), and now the board will not boot. We can boot from an SD card and program the SPL, u-boot, and kernel/rootfs bundles into flash. We can then display the images indicating they have actually been programmed into flash. But when we boot without the SD card installed, the board prints 'C' characters out of the serial console port, indicating it's requesting a boot image from the serial port. It's as if the images in the flash are not being recognized by the Processor's microcode.

QUESTIONS:
1. Has anyone seen this problem?
2. Is there a solution?

Thank you,
Everett

  • 0
    TI__Mastermind 28235 points

    Hi Everett,

    I have assigned an Expert to answer your queries. He is currently out for holidays, so expect a response after Jan 2nd. 

    Best Regards,

    Suren

  • 0 in reply to Suren Porwar
    Prodigy 50 points

    Hello,

    It's been almost 3 weeks since my original post, so I'm trying again.

    BACKGROUND:
    My name is Everett Sykes. I'm a design engineer for Western Telematic, Inc. We build a series of products that contain a CPU board using the "AM3352 ARM Cortex-A8 MPU" processor. This CPU board is roughly based on the BeagleBone Black board.

    PROBLEM:
    We previously used Spansion S34ML01G2 flash and everything works fine. We built a batch of boards using the SkyHigh Memory S34ML01G3 (3rd Generation flash memory), and now the AM3352 will not recognize the SPL/MLO image. We can boot from an SD card and the read and write the flash. But when we boot without the SD card, the board prints 'C' characters out of the serial console port, indicating it's requesting a boot image from the serial port, as if the image in flash is not being recognized by the Processor.

    QUESTIONS:
    1. Has anyone seen this problem?
    2. Is there a solution?

    Thank you,
    Everett

  • 0 in reply to Everett Sykes1
    TI__Guru 68430 points

    Hello Everett,
    I'm closing this one, and let's follow up your new e2e post on the same topic.
    e2e.ti.com/.../1185746
    Best,
    -Hong

  • 0 in reply to Hong Guan64
    Prodigy 50 points

    Solved.

    The new SkyHigh Memory S34ML01G3 has no ECC bits, where the older Spansion S34ML01G2 had 4. I just had to change the SYSBOOT[9] pin (SYSBOOT Configuration Pins) from '0' to '1' to have the ECC be handled by the NAND instead of the ROM.

    Thanks,
    Everett