Boot from sdcard or usb stick without erasing emmc

Technical Support
1

The documentation said that to boot from sd card, we must erase emmc first.

Is there a way to boot from sd card or usb stick without erasing emmc first?

2

Hi xuzhongxing,

You can try Mregister mode to bypass the eMMC and boot from SD card, but you need u-boot in SD card.

3

Hello, Curious, what system are you planning to boot from SD card or USB stick?

4

I plan to try out Zircon on this board.