Introduction
Serial Wire Debug (SWD) is a commonly used debugging interface for embedded devices that enables direct access to and debugging of processor cores.
To prevent unauthorized access to processor and system states, the system supports a security protection mechanism for the SWD debugging interface.
Through authentication methods, this mechanism strictly controls debug interface access. It meets security management requirements during different product lifecycle stages and significantly enhances overall system security.
Features
1. Hierarchical Access Control
Supports multiple debug privileges: invasive, non-invasive, secure invasive, and secure non-invasive.
Supports disabling SWD interface to completely block debug access.
2. Key-based Authentication Mechanism
Debug privileges are bound with OTP-stored keys to implement identity verification, ensuring debug interface security.
3. Flexible Security Activation
Enabled by default for convenient development and debugging.
During mass production stage, protection can be activated through OTP encryption configuration. System resources remain inaccessible until verification passes.