An approach for testing programmable/configurable field programmable gate arrays

  • Authors:
  • W. K. Huang;F. Lombardi

  • Affiliations:
  • -;-

  • Venue:
  • VTS '96 Proceedings of the 14th IEEE VLSI Test Symposium
  • Year:
  • 1996

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Abstract

This paper presents a new general technique for testing field programmable gate arrays (FPGAs) by fully exploiting their programmable and configurable characteristics. A hybrid fault model is introduced based on a physical and behavioral characterization; this permits the detection of a single fault, as either a stuck-at or a functional fault. A general approach which regards testing as can application for the reconfigurable FPGA, is then proposed. It is shown that different arrangements of disjoint one-dimensional arrays with unilateral horizontal connections and common vertical input lines provide a very good solution. A further feature that is considered for array testing, is the relation between the configuration of the logic blocks and the number of I/O pins in the chip. As an example, the proposed approach is applied for testing the Xilinz 4000 family of FPGAs.