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9.3. AHB-AP

This section describes the AHB Access Port (AHB-AP), for access to a system AHB bus through an AHB-Lite master. It acts as a slave to the DAP internal bus, driven by only a single debug port, typically an external SWJ-DP, at any one time. Figure 9.2 shows the internal structure of the AHB-AP.

Figure 9.2. AHB access port internal structure.

Figure 9.2. AHB access port internal structure.

The AHB-AP has two interfaces:

  • An internal DAP bus interface that connects to the SWJ-DP

  • An AHB master port for connection through the matrix to the external AHB-Lite interface and the PPB.

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