3.12.1. External inputs

The number of external inputs implemented by a PTM is implementation defined, between zero and four. Each implemented external input provides a resource that you can use to define PTM events.

Read bits [19:17] of the Configuration Code Register to find the number of implemented external inputs. This field reads-as-zero if the PTM does not implement any external inputs.

Note

The external inputs, typically implemented as EXTIN signals, are not related directly to memory accesses. Tracing is imprecise if you use them in any way to enable or disable tracing. For more information about imprecise tracing, see Imprecise TraceEnable events.

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