2.2.2. Instrumentation resources, ETMv3.3 and later

From ETMv3.3, an ETM can include up to four Instrumentation resources. These resources can be set, cleared or pulsed by low-overhead ARM or Thumb instructions. In this context, set means the resource is active, corresponding to a logic 1 output, and clear means a resource is inactive, corresponding to a logic 0 output.

When a resource is pulsed it is set for the current cycle and cleared from the following cycle.

Instrumentation resources are described in more detail in Instrumentation resources, from ETMv3.3.

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