2.2.4. Debug Port AHB-AP interface

The processor contains an Advanced High-performance Bus Access Port (AHB-AP) interface for debug accesses. An external Debug Port (DP) component accesses this interface. The Cortex-M3 system supports three possible DP implementations:

The two DP implementations provide different mechanisms for debug access to the processor. Your implementation must contain only one of these components.

Note

Your implementation might contain an alternative implementer-specific DP instead of SW-DP or SWJ-DP. See your implementer for details.

For more detailed information on the DP components, see the CoreSight Components Technical Reference manual.

For more information on the AHB-AP, see Chapter 7 Debug.

The DP and AP together are referred to as the Debug Access Port (DAP).

For more detailed information on the debug interface, see the ARM Debug Interface v5 Architecture Specification.

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