IMX6 switches to usb serial download mode after reboot

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IMX6 switches to usb serial download mode after reboot

Contributor III


I'm setting the IMX6 device in USB serial download mode & booting Linux from the SD card. When I reboot the device using the "reboot" command, the device again enters USB serial download mode. 

The question here is why the device enters USB serial download mode again & not boot normally?

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NXP TechSupport
NXP TechSupport

Hello, I hope you are doing well.

ROM code will always try to find a valid image for booting in the selected boot device, unless serial download is selected.

There is only 2 ways to inputs that control the behavior of the Boot ROM code, Fuses or GPIO​.

If everything is correct ROM code will execute the code and continue the boot sequence.​

Is it possible to check if there is some issue that is causing switch to serial download mode? (such as boot mode pins voltage levels).

Does the issue occur only by using the reboot command?

Best regards.

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