Debug Authentication STM32H5 How to Introduction

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Introduction to Debug Authentication for STM32H5 MCUs

1. Debug Authentication

Debug authentication controls
- Debug opening
- Regressions
It can be used
- During development
- During manufacturing
- For field return analysis
Features
- When TZ disabled: usage of a password (very similar to U5). Only regression possible
- When TZ enabled: usage of cryptography (certificates). Regressions and debug opening
Debug Authentication principle
- Uses JTAG dedicated access point (ap0) to communicate with the chip
- Secure protocol defined by ARM : PSA ADAC V1.0. (Authenticated Debug Access Control)

2. Debug Authentication principle - TrustZone disabled

3. Debug Authentication principle - TrustZone enabled

4. How to start with STM32 and DA Access

You can refer to the following pages for getting started examples of DA access.