11.2.2. TPIU Formatter

The formatter inserts source ID signals into the data packet stream so that trace data can be re-associated with its trace source. The formatter is always active when the Trace Port Mode is active.

The formatting protocol is described in the CoreSight Architecture Specification. You must enable synchronization packets in the DWT to provide synchronization for the formatter.

When the formatter is enabled, half-sync packets may be inserted if there is no data to output after a frame has been started. Synchronization, caused by the distributed synchronization from the DWT, will ensure that any partial frame is completed, and at least one full synchronization packet will be generated.

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