[FAQ] AM62x, AM62Px, AM62D-Q1, AM64x, AM275x: S28HS512T boots in xSPI Bootmode but not in OSPI Bootmode

Reasoning

Let us firstly understand how ROM boots in OSPI bootmode.

This can be found under TRM. The following section reads:

We are looking at a combination of: 8Bh(Command) + 24 bit(3 byte Address) + 8 dummy cycles

If you read through the flash datasheet: https://www.infineon.com/row/public/documents/10/49/infineon-s28hs512t-s28hs01gt-s28hl512t-s28hl01gt-512mb-1gb-semper-tm-flash-octal-interface-1-8v-3-datasheet-en.pdf

There is no mentioning of the command 8Bh, hence the flash does not supports booting in OSPI bootmode.

NOTE:

It is a good practise to check how ROM boots in a specific bootmode and cross check if the Flash supports the commands.

Booting in OSPI bootmode is different compared to booting in xSPI bootmode.

Note, on all the TI EVMs mentioned above, the OSPI NOR Flash which is S28HS512T boots successfully in xSPI bootmode but not in OSPI bootmode. It is highly encouraged to check how booting happens in OSPI vs xSPI bootmode from the device specific TRM.

xSPI Bootmode:

OSPI Bootmode: