A sudden power-outage resilient nonvolatile microprocessor for immediate system recovery

Naoya Onizawa, Akira Mochizuki, Akira Tamakoshi, Takahiro Hanyu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

In energy harvesting applications, a power supply generated from a renewable power source is unstable that may induce a sudden power outage, losing data being processed. This paper introduces a sudden power-outage resilient nonvolatile microprocessor based on a flashback architecture for immediate system recovery, where nonvolatile storage elements, called magnetic-tunnel-junction (MTJ), are exploited with standard CMOS gates. In the proposed architecture, data stored within a past few clocks are also kept in redundant MTJ-based nonvolatile flip-flops (NV-FF), while storing the current data in NV-FFs. Even if a sudden outage induces a failure of storing the data partly, the inconsistency of the stored data is automatically and immediately recovered by reordering the past data, which enables a continuous operation. A nonvolatile Cortex-M0 processor based on the proposed architecture is implemented using 90nm CMOS/100nm MTJ technologies. It demonstrates the immediate system recovery after a sudden power outage with a 32% area reduction compared to a triple modular redundancy based equivalent microprocessor.

Original languageEnglish
Title of host publicationProceedings of the 2015 IEEE/ACM International Symposium on Nanoscale Architectures, NANOARCH 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages39-44
Number of pages6
ISBN (Electronic)9781467378482
DOIs
Publication statusPublished - 2015 Aug 5
EventIEEE/ACM International Symposium on Nanoscale Architectures, NANOARCH 2015 - Boston, United States
Duration: 2015 Jul 82015 Jul 10

Publication series

NameProceedings of the 2015 IEEE/ACM International Symposium on Nanoscale Architectures, NANOARCH 2015

Other

OtherIEEE/ACM International Symposium on Nanoscale Architectures, NANOARCH 2015
CountryUnited States
CityBoston
Period15/7/815/7/10

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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