The devices implement circuitry to support EnergyTrace++ technology. The EnergyTrace++ technology lets you observe information about the internal states of the microcontroller. These states include the CPU Program Counter (PC), the ON or OFF status of the peripherals and the system clocks (regardless of the clock source), and the low-power mode currently in use. These states can always be read by a debug tool, even when the microcontroller sleeps in LPMx.5 modes.
The activity of the following modules can be observed: