1.1.1. Structure of an ETM

The main features of an ETM are:

Trace generation

Outputs information that helps you understand the operation of the processor. The trace protocol provides a real-time trace capability for processor cores that are deeply embedded in much larger ASIC designs.

Note

You cannot determine how the processor is operating by observing the pins of the ASIC, because the ASIC typically includes significant amounts of on-chip memory.

Triggering and filtering facilities

An extensible specification enables you to control tracing by specifying the exact set of triggering and filtering resources required for a particular application. Resources include address comparators and data value comparators, counters, and sequencers.

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