Evaluation of reinitialization-free nonvolatile computer systems for energy-harvesting Internet of things applications

Naoya Onizawa, Akira Tamakoshi, Takahiro Hanyu

研究成果: Article査読

抄録

In this paper, reinitialization-free nonvolatile computer systems are designed and evaluated for energy-harvesting Internet of things (IoT) applications. In energy-harvesting applications, as power supplies generated from renewable power sources cause frequent power failures, data processed need to be backed up when power failures occur. Unless data are safely backed up before power supplies diminish, reinitialization processes are required when power supplies are recovered, which results in low energy efficiencies and slow operations. Using nonvolatile devices in processors and memories can realize a faster backup than a conventional volatile computer system, leading to a higher energy efficiency. To evaluate the energy efficiency upon frequent power failures, typical computer systems including processors and memories are designed using 90nm CMOS or CMOS/magnetic tunnel junction (MTJ) technologies. Nonvolatile ARM Cortex-M0 processors with 4 kB MRAMs are evaluated using a typical computing benchmark program, Dhrystone, which shows a few order-of-magnitude reductions in energy in comparison with a volatile processor with SRAM.

本文言語English
論文番号0802B7
ジャーナルJapanese journal of applied physics
56
8
DOI
出版ステータスPublished - 2017 8

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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