8.1.3 Configuration

The security module is configured with the Flash Configuration bits and SFRs. The Configuration bits’ values are loaded from Flash at Reset and are maintained until the next Reset. Updates to the configuration values in Flash take effect on the next Reset. The Protection Region Descriptor SFRs Reset values are loaded from the Configuration bits as well. These descriptors include a locking capability (modification is disabled). This allows for several configuration options including:

• Dynamic configuration by firmware
• Static configuration by boot firmware
• Permanent configuration using the Flash Configuration bits

Writes to a locked (read-only) Protection Region Descriptor register are ignored.