4.7. Debug Access Port ROM table

The Debug Access Port (DAP) provides an internal ROM table connected to the master Debug APB port of the APB Mux. The DAP provides multiple master driving ports, all accessible and controlled through a single external interface port to provide system wide debug.

The ROM table stores the locations of the components on the Debug APB. The ROM table is a read-only device, writes are ignored.


The DAP is not present in all FPGA builds. Refer to the application note for your configuration to determine if the DAP (and therefore the DAP ROM table) are used in your system.

The DAP table might not be implemented in a physical ROM. In some applications it might be implemented in a reserved area of RAM.

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