Comparison of optimized multi-stage clock gating with structural gating approach

Xin Man, Shinji Kimura

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

7 Citations (Scopus)

Abstract

Clock gating is a power efficient technique by switching off unnecessary clock signals to the registers. The condition under which the registers can be safely gated is checked using EXOR of the current and the next state values. Due to the extra power consumed by clock gating logics consisting of a latch and an AND gate, we have proposed an optimum sharing method of gating controls based on BDD (Binary Decision Diagram) with single-stage clock gating for power optimization. In this paper, we enhance the optimization method including multi-stage clock gating and compare with structural gating approach. By multi-stage clock gating, the activities of both registers and clock gating logics can be reduced. On a set of interface circuits, we have obtained power reduction by 14.1% on average compared with single-stage structural method and by 10.8% compared with multi-stage structural gating approach. Our BDD based method is also fast and scalable by candidates pruning.

Original languageEnglish
Title of host publicationIEEE Region 10 Annual International Conference, Proceedings/TENCON
Pages651-656
Number of pages6
DOIs
Publication statusPublished - 2011
Event2011 IEEE Region 10 Conference: Trends and Development in Converging Technology Towards 2020, TENCON 2011 - Bali
Duration: 2011 Nov 212011 Nov 24

Other

Other2011 IEEE Region 10 Conference: Trends and Development in Converging Technology Towards 2020, TENCON 2011
CityBali
Period11/11/2111/11/24

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Keywords

  • BDD
  • candidates pruning
  • dynamic power reduction
  • multi-stage clock gating
  • structural method

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

Cite this

Man, X., & Kimura, S. (2011). Comparison of optimized multi-stage clock gating with structural gating approach. In IEEE Region 10 Annual International Conference, Proceedings/TENCON (pp. 651-656). [6129188] https://doi.org/10.1109/TENCON.2011.6129188