The ECT provides an interface to the debug system as Figure 7.1shows. This enables ARM/ETM
subsystems to interact, that is, cross trigger with each other.
The debug system enables debug support for multiple cores, together
with cross triggering between the cores and their respective ETMs.
The main function of the ECT is to pass debug events from
one core to another. For example, the ECT can communicate debug
state information from one core to another, so that program execution
on both processors can be stopped at the same time, if required.
- Cross
Trigger Interface (CTI)
The CTI
combines and maps the trigger requests, and broadcasts them to all
other interfaces on the ECT as channel events. When the CTI receives
a channel event it maps this onto a trigger output. This enables
subsystems to cross trigger with each other. The receiving and transmitting
of triggers is performed through the trigger interface.
- Cross Trigger Matrix (CTM)
This block controls the distribution of channel
events. It provides Channel Interfaces (CIs)
for connection to either CTIs or CTMs. This enables multiple CTIs
to be linked together.
PDF version