Fault dictionary compaction has been accomplished in the past by removing responses on individual output pins for specic test vectors. In contrast to the previous work, we present techniques for eliminating entire sequences of outputs and for eciently 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.
Vamsi Boppana, W. Kent Fuchs