**7. Conclusions**

In this paper, we presented the implementation of a power managemen<sup>t</sup> unit capable of operating an idleness aware dynamic power mode adaptation. We validated the proposed approach on a novel low-cost low-power heterogeneous MCU for IoT edge fabricated in 28 nm SOI technology. The proposed power manager allows achieving a theoretical power consumption reduction higher than the 28% in absence of core activity. We confirmed the expectations during the operation of the system, reporting more than 43% of average power consumption reduction when the target idleness is selected according to the real idleness of the application, and a peak power consumption reduction of 45%.

**Author Contributions:** Conceptualization, L.B. and A.D.; methodology, H.F. and J.P.; software, A.D.; validation, A.D.; investigation, A.D.; data curation, A.D.; writing–original draft preparation, A.D.; writing–review and editing, A.D., H.F., J.P. and L.B.; supervision, H.F., J.P. and L.B.; project administration, H.F., J.P. and L.B. All authors have read and agree to the published version of the manuscript.

**Funding:** Partially supported by NXP.

**Conflicts of Interest:** The authors declare no conflict of interest.
