Optimization And Development Of A Low Power Microcontroller For IoT Application

Chong, Ivan Wei Yang (2017) Optimization And Development Of A Low Power Microcontroller For IoT Application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text Optimization And Development Of A Low Power Microcontroller For Iot Application - Ivan Chong Wei Yang - 24 Pages.pdf - Submitted Version Download (502kB)

Abstract

Internet of Things (IoT) devices are soon to be a huge enhancement of microcontroller technology. The IoT demands minimal power consumption. Being able to have right features at the right power consumption will be critical. In this work, an example of IoT device - a fall detection system with data monitoring targeting elderly people has been developed. Rather than using a general purpose microcontroller, a specific application based system has been proposed. The mechanism of the falling behaviour has been modelled by a finite state machine. Trend of changes in accelerometer has been used as the input of the system. Clock gating technique has been applied in the design in order to reduce the power consumption of the developed system. Effectiveness of clock gating technique has also been evaluated. The highest reduction in power consumption achieved is 13.26%. Moreover, RAM module is added to the design in order to lower the uploading rate of IoT transmitter. Its impact to the finite state machine is studied as well as the effectiveness with clock gating technique. The uploading rate is reduced by 96.88%. The proposed design has been implemented using Synopsys tool in 0.13um Silterra process technology. By reducing the power consumption of the IoT devices, this could greatly prolong the battery powered lifetime of a sensor node. Benchmarking with the lowest compared microcontroller, STM32L051x6 is 1357% higher power consumption than this project design.

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