Fault Dictionary Compaction by Output Sequence Removal
Vamsi Boppana, W.K. Fuchs · 1994
Fault dictionary compaction has been accomplished in the past by removing responses on individual output pins for specific test vectors. In contrast to the previous work, we present techniques for eliminating entire sequences of outputs and for efficiently storing the remaining output sequences. Experimental results on the ISCAS 85 and ISCAS 89 benchmark circuits show that the sizes of dictionaries proposed are substantially smaller than the full fault dictionary, while the dictionaries retain most or all of the diagnostic capability of the full fault dictionary. 1 Introduction The most significant problem with the fault dictionary approach to failure location is that the the size of the full fault dictionary may be large and impractical for large circuits [1], [2],[3]. Several methods of compaction including the Pass/Fail dictionary [4], Compact [4] dictionary and the Sequential [5] dictionary have been developed. However, these schemes consider only specific output pins for compact...