13.1. About the cross trigger

The Cortex-A15 processor has a single external cross trigger channel interface. This external interface is connected to the CoreSight CTI interface corresponding to each processor through a simplified Cross Trigger Matrix (CTM). A number of trigger inputs and trigger outputs are connected between debug components in the Cortex-A15 processor and CoreSight CTI blocks.

The CoreSight Cross Trigger Interface (CTI) enables the debug logic, PTM, and PMU, to interact with each other and with other CoreSight components. This is called cross triggering. For example, you configure the CTI to generate an interrupt when the PTM trigger event occurs.

Figure 13.1 shows the debug system components and the available trigger inputs and trigger outputs.

Figure 13.1. Debug system components

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