1.3. Debug Access Port (DAP)

The DAP uses an AHB-AP interface to communicate with the processor and other peripherals. There are two different supported implementations of the Debug Port, the Serial Wire JTAG Debug Port (SWJ-DP) and the Serial Wire Debug Port (SW-DP). Your Cortex-M3 implementation might contain either of these depending on the implementation used by your silicon manufacturer.

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