Thank you for your answers. However, the board never recognizes the SD 
card...

On Sunday, May 16, 2021 at 4:35:05 p.m. UTC-4 RobertCNelson wrote:

> The am57xx boot rom defaults to microsd before emmc...
>
> On Sun, May 16, 2021, 3:07 PM Dennis Lee Bieber <[email protected]> 
> wrote:
>
>> On Sun, 16 May 2021 09:49:02 -0700, in 
>> gmane.comp.hardware.beagleboard.user
>> "John Dammeyer" <[email protected]> wrote:
>>
>> >If it's like the Beaglebone Black, when you apply power,  you have to 
>> hold the boot button down for quite a while.    That's what tells the 
>> system to boot from the sd card.
>> > 
>>
>>         That has only applied to very old BBB eMMC images... Sometime in 
>> the
>> late Wheezy or mid-Jessie era, u-Boot was modified to automatically search
>> for a uSD card image, and transfer control to the SD card if found.
>>
>>         I haven't had to touch the boot select switch in something like 3+
>> years.
>>
>>         Note: the BB AI does not have a boot select switch -- it expects 
>> the
>> eMMC u-Boot to do the switching if a proper card is found.
>>
>>
>> -- 
>> Dennis L Bieber
>>
>> -- 
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>>
>

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