2.1 Immutable ROM Code Bootloader

At the heart of the Secure Boot mode process is the on-chip ROM code, which is read-only and unmodifiable. This “first-stage bootloader” is the first code executed after a reset and contains logic to perform the following:

Validate the integrity of the OTP memory content
Perform minimal device initialization
Enable Secure Boot mode if requested by the Secure Boot Configuration Packet (SBCP)
Access keying material provisioned in OTP
Enforce security policies stored in the SBCP

DS00006397A

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