7.10.3. Periodic synchronization

When a periodic synchronization request occurs, the ETM must generate all of the synchronization packets, but they do not have to immediately follow each other. This means the ETM can delay the generation of any synchronization packet if the FIFO does not have enough space for the packet. If the ETM receives a periodic synchronization request while trace is disabled because the TraceEnable signal is LOW, it delays synchronization until trace is re-enabled.

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