7.13.2. Support for cycle-accurate tracing, ETMv3.3 and later

From ETMv3.3, whether an ETM macrocell supports cycle-accurate tracing is implementation defined. Debug tools can write and then read the ETMCR to find whether cycle-accurate tracing is supported. See Checking support for cycle-accurate tracing, ETMv3.3 and later for more information.

In ETMv3.5, cycle accuracy is not maintained through an ETM FIFO overflow.

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