TAM Optimization for Mixed-Signal SOCs using Analog Test Wrappers

  • Authors:
  • Anuja Sehgal;Sule Ozev;Krishnendu Chakrabarty

  • Affiliations:
  • Duke University, Durham, NC;Duke University, Durham, NC;Duke University, Durham, NC

  • Venue:
  • Proceedings of the 2003 IEEE/ACM international conference on Computer-aided design
  • Year:
  • 2003

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Abstract

We present a new approach for TAM optimization and testscheduling in the modular testing of mixed-signal SOCs. A testplanning approach for digital SOCs is extended to handle analogcores in a plug-and-play fashion. A test wrapper based on anADC/DAC pair and a digital configuration circuit is designed foranalog cores such that these cores can be accessed through digitalTAMs. In this way, there is no dependence on an analog testbus and expensive mixed-signal testers. Experimental results arepresented for several ITC'02 SOC test benchmarks to which threeanalog cores are added. The results show that the testing of analogcores can be interleaved with the testing of digital cores to reducethe overall testing time for a mixed-signal SOC.