10.2.1 Processor interfaces

System register access allows the processor to directly access certain debug registers. The external debug interface allows both external and self-hosted debug agents to access debug registers.
Access to the debug registers is partitioned as follows:
Debug registers
This interface is System register based and memory-mapped. You can access the debug register map using the APB slave port.
Performance monitor
This interface is System register based and memory-mapped. You can access the performance monitor registers using the APB slave port.
Trace registers
This interface is memory-mapped.
Related information
10.10 External debug interface
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