Hello,
on the iMX8MM manual I can see at figure 6-25 page 828 - System boot, that if the Boot mode selected is 2 ( internal boot ) and the selected device doesn't contain a valid image, then the system tries to boot from EEPROM recovery device before going to fall back to SD card and USB serial download.
However I haven't found confirmation of this in the internal boot chapter of the manual 6.1.2.5 or other part.
Could you confirm that internal ROM bootloader tries booting from SPI if selected device ( for example eMMC ) is missing a valid image ?
Does this happen also when BT_FUSE_SEL is set to 1 and thus the selected device ( for example eMMC ) is on the fuses settings ?
thank you
@Piotr1
Hello,
i.MX8MM recovery boot is from ECSPI.
Besides this recovery boot, SD/MMC manufacture mode allows to boot from USDHC2
before entering USB download mode if other boot devices failed.
Following diagram from RM summarize the correct boot flow:
Regards,
Yuri.
@Yuri I'm interested in the same topic. Could you share with me some information?