8.9.2. TRACECTL removal

The TPIU supports two modes:

The chosen mode depends on the connected trace port analyzer/capture device. Legacy capture devices use the control pin to indicate the packet type. Newer capture devices can use more pins for data and do not require a reserved data pin.

Support for both of these modes is required to ensure backwards compatibility and for future, higher port speeds. If a low pin count or an optimized design is required, it is not necessary to implement the TRACECTL pin. This design choice must be reflected in the programmer's model to enable tools to always enable the formatter and run in continuous mode.

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