Power Conscious Test Synthesis and Scheduling for BIST RTL Data Paths

  • Authors:
  • Nicola Nicolici;Bashir M. Al-Hashimi

  • Affiliations:
  • -;-

  • Venue:
  • ITC '00 Proceedings of the 2000 IEEE International Test Conference
  • Year:
  • 2000

Quantified Score

Hi-index 0.00

Visualization

Abstract

Previous research has outlined that power dissipatedduring test application is substantially higher than duringfunctional operation, which leads to loss of yield and decreases reliability. This paper shows for the first time howpower is minimized in BIST RTL data paths by using powerconscious test synthesis and test scheduling. According tothe necessity for achieving the required test efficiency powerdissipation is classified into necessary and useless powerdissipation. According to the occurrence during the testingprocess power dissipation is classified into test applicationand shifting power dissipation. The effect of test synthesisand scheduling on power dissipation is analyzed andpower minimization is achieved in two steps. Firstly, duringthe testable design space exploration only power conscioustest synthesis moves are accepted leading to minimizationof useless power dissipation. Secondly, module selectionduring power conscious test scheduling satisfies power constraints while reducing test application time. Experimentalresults using generic power models show savings up to 28%in test application power dissipation and up to 29% in shiftingpower dissipation.