About the CoreSight 20 connector

The CoreSight 20 connector can be used in either standard JTAG (IEEE 1149.1) mode or Serial Wire Debug (SWD) mode. It can also optionally capture up to 4 bits of parallel trace in Trace Port Interface Unit (TPIU) continuous mode.

When this connector is configured to be a parallel trace source, pins 12 to 20 switch to their alternate trace functions.

The following figure shows the CoreSight 20 connector pinout:

Figure 18. CoreSight 20 connector pinout

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A polarizing key is fitted only at the target end of the cable.

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