Effective Software-Based Self-Test Strategies for On-Line Periodic Testing of Embedded Processors

  • Authors:
  • Antonis Paschalis;Dimitris Gizopoulos

  • Affiliations:
  • -;-

  • Venue:
  • Proceedings of the conference on Design, automation and test in Europe - Volume 1
  • Year:
  • 2004

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Abstract

Software-based self-test (SBST) strategies are particularly useful for periodic testing of deeply embedded processors in low-cost embedded systems that do not require immediate detection of errors and cannot afford the well-known hardware, software, or time redundancy mechanisms.In this paper, first, we identify the stringent characteristics of an SBST test program to be suitable for on-line periodic testing. Then, we introduce a new SBST methodology with a newclassification scheme for processor components. After that, we analyze the self-test routine code styles for the three more effective test pattern generation (TPG) strategies in order to select the most effective self-test routine for on-line periodic testing of a component under test. Finally, we demonstrate the effectiveness of the proposed SBST methodology for on-line periodic testing by presenting experimental results for a RISC pipeline processor.