NavQPlus can be configured to boot from either SD card or eMMC. It also has a flash mode that allows you to flash either the eMMC or SD card over USB-C®.
See the table below for the boot switch configuration.
Mode
Switch 1
Switch 2
SD
ON
ON
eMMC
OFF
ON
Flash
ON
OFF
(NOTE: This boot switch table is referenced from several locations in this gitbook)