TDA4VH-Q1: SBL dual backup.the ROM loads the SBL firmware of partition A. If this fails, the ROM loads the SBL firmware of partition B.

Hi,

Sorry, are you asking this backup image for SBL or for application image? 

SBL currently does not support loading backup application image, if this is required, you would require to modify SBL code for this feature. 

Regards,

Brijesh 

I want to know if SBL can be backup.

SBL can have its own copy in the ospi, but sbl does not support application backup. 

When powered on, the MCU R5 ROM program goes to OSPI flash to load the SBL.

I mean for example I store an SBL program at 0x00000000 in OSPI flash, and I also store an SBL backup program at 0x30000000 in OSPI flas. I can choose whether to let the MCU R5 ROM load the SBL program at 0x00000000 or x30000000.

Hi zheng, 

SBL is booted by the first boot loader, ROM, so we cannot choose to boot either from offset 0x0 or 0x3000000. ROM based on image verification decides to boot either from offset 0x0 or from offset 0x40000. 

Regards,

Brijesh

 About the image verification,How to verify image verification?

How does the ROM validate the image of the SBL, and what does it validate？

Hi zheng,

Please refer to TRM to understand how ROM verifies the image. 

Regards,

Brijesh