Capture-power-aware test data compression using selective encoding

  • Authors:
  • Jia Li;Xiao Liu;Yubin Zhang;Yu Hu;Xiaowei Li;Qiang Xu

  • Affiliations:
  • School of Software, Tsinghua University, Beijing, China;Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong;Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong and CAS/CUHK Shenzhen Institute of Advanced Technology, Shenzhen, China;Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China;Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China;Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong and CAS/CUHK Shenzhen Institute of Advanced Technology, Shenzhen, China

  • Venue:
  • Integration, the VLSI Journal
  • Year:
  • 2011

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Abstract

Ever-increasing test data volume and excessive test power are two of the main concerns of VLSI testing. The ''don't-care'' bits (also known as X-bits) in given test cube can be exploited for test data compression and/or test power reduction, and these techniques may contradict to each other because the very same X-bits are likely to be used for different optimization objectives. This paper proposes a capture-power-aware test compression scheme that is able to keep capture-power under a safe limit with low test compression ratio loss. Experimental results on benchmark circuits validate the effectiveness of the proposed solution.