Clock-Frequency Switching Technique for Energy Saving of Microcontroller Unit (MCU)-Based Sensor Node

Pumin Duangmanee and Peerapong Uthansakul
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Pumin Duangmanee: School of Telecommunication Engineering, Suranaree University of Technology, Nakhon Ratchasimina 30000, Thailand
Peerapong Uthansakul: School of Telecommunication Engineering, Suranaree University of Technology, Nakhon Ratchasimina 30000, Thailand

Energies, 2018, vol. 11, issue 5, 1-13

Abstract: In this paper; a technique is proposed for reducing the energy consumption of microcontroller-based sensor nodes by switching the operating clock between low and high frequencies. The proposed concept is motivated by the fact that if the application codes of the microcontroller unit (MCU) consist of no-wait state instruction sets, it consumes less energy when it operates with a higher frequency. When the application code of the MCU consists of wait instruction sets; e.g., a wait acknowledge signal, it switches to low clock frequency. The experimental results confirm that the proposed technique can reduce the MCU energy consumption up to 66.9%.

Keywords: energy saving; microcontroller unit (MCU); clock frequency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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