2.9.1.5.1 Standard Boot Mode

In standard boot mode, the header must be configured as a plain text image, and its data is validated with the header SHA-256 TAG.

If the “Anti-Rollback” feature is enabled, the ROM code checks that the version defined in the header is superior or equal to the one configured in the OTP (via Bootstrap Version blocks).

The boot program size is then checked against the maximum size available.

Once these verifications are done, the boot program is loaded into SRAM and its SHA-256 digest is checked.