The Embedded Trace Macrocell (ETM) interface enables you to connect an external ETM unit to the processor for real-time code and data tracing of the core in an embedded system.

The ETM interface collects various processor signals and drives these signals from the processor. The interface runs at the full speed of the processor. The ETM interface connects directly to the external CoreSight ETM -A5 without any additional glue logic. Figure 2.2 shows the ETM interface signals.

See Trace interface signals for more information.

You can disable the ETM interface to save power when not required. See the CoreSight ETM-A5 Technical Reference Manual for more information on the ETM interface, including the event bus, EVNTBUS.