EEPROM recovery boot on iMX8MM

[antonio_santagi]

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

[Yuri]

@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.

[Piotr1]

@Yuri I'm interested in the same topic. Could you share with me some information?

[Yuri]

@antonio_santagi 
Hello,

  I've sent You some comments.

Regards,
Yuri.

[antonio_santagi]

Hello @Yuri , I have not received your message yet.

[Yuri]

@antonio_santagi 
Hello,

  eurotech mail was used.

Regards,
Yuri.