~~tag>Edge2 boot-sequence~~

====== Edge2 OS Boot Priority ======

Edge2 have possibility boot-up from : ''eMMC'', ''TF Card'', ''SPI-Flash''

<WRAP info >
We talking there only about 1st stage SoC boot, 
next second stage OS loading possible for any other devices and depends from ''U-Boot'' configurations
</WRAP>

===== Default boot priority =====

  - SPI-Flash <wrap important>always highest priority</wrap>
  - eMMC
  - TF-Card 

<WRAP tip >
If the SPI Flash contains a second-stage bootloader (e.g., OOWOW), it will attempt to boot from TF Card first when a card is inserted.

See also: [[products:sbc:edge2:install-os:install-os-into-external-storage|]]
</WRAP>

===== Booting from TF Card via TST Mode =====

If both SPI Flash and eMMC contain no valid boot image or are corrupted, you can force boot from a TF card using the TST Mode shortcut:

  - Insert a bootable TF card into the Edge-2L.
  - Quickly press the FUNCTION (FN) key three times within 2 seconds.
  - The device will then boot from the TF card.

This method is useful for recovery or when booting from external storage is required.

===== OOWOW boot special shortcut =====

Hold ''FUNCTION'' and short press ''RESET'' to force boot [[:OOWOW]] service from SPI-flash, and skip other boot sources

<WRAP important>TF-card slot must be empty.</WRAP>