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problem with sys_boot

gang zhang56289
Prodigy 10 points

Other Parts Discussed in Thread: OMAP3530

hi,

i have trouble with omap3530 boot.

I set sys_boot[5:0]0B001101.I down wince6 to flash with SD Card.

 Problem : Some omap3530 can boot when no insert SD Card,but some can't boot.

why?

someone help me .

Thanks

  • 0
    TI__Expert 6735 points

    Gang:

    Do you have an OMAP3530 EVM Rev G?   The switch SW4 on the main board is defined

    as follows.  A switch in the ON position results in a logic zero on the SYS_BOOT signal line:

    SW4 Pos           Signal                             Boot MMC1 then UART3                Boot NAND then UART3        

    1                          SYS_BOOT0                0 = ON                                                1 = OFF

    2                          SYS_BOOT1                0 = ON                                                0 = ON

    3                         SYS_BOOT2                 0 = ON                                                1 = OFF

    4                         SYS_BOOT3                 1 = OFF                                              0 = ON

    5                         SYS_BOOT4                 1 = OFF                                              1 = OFF

    6                         SYS_BOOT5                 0 = ON                                                0 = ON

     

    In some of our documentation we say set SW4 = 10 0111 for MMC1 boot where 1 means switch is in ON position

    even though the actual SYS_BOOT signal is logic 0, so there may be some confusion there.

    OMAP3530 Tech ref manual Table 25-3 has booting sequence based on SYS_BOOT signals.  Which configuration

    are you trying to use?

    Regards,

    Michael T

    PS: Please mark this post as answered via the Verify Answer button below if you think it answers your question.  Thanks!

  • 0 in reply to Michael T
    TI__Intellectual 1665 points

     

    Gang,

     

    When the board boots without an SD card, it is probably booting from Flash memory. As suggested by Mike, please make sure your switch settings are set to boot from MMC first.

     

    Regards, Punya

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