Portal de Periódicos da CAPES

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

2018; Multidisciplinary Digital Publishing Institute; Volume: 11; Issue: 5 Linguagem: Inglês

10.3390/en11051194

1996-1073

Pumin Duangmanee, Peerapong Uthansakul,

Network Time Synchronization Technologies

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%.