Interleaving of delay fault test data for efficient test compression with statistical coding

This paper proposes a method providing efficient test compression, for delay fault testing using enhanced scan design. In the proposed method, the initial anal transition. vectors of test data are interleaved before test compression using statistical coding. This paper also shows test architecture for delay fault testing using the proposed method. The proposed method is experimentally evaluated from the viewpoint of compression rates. For robust. testable path. delay fault testing on, 11 out of 23 ISCAS89 benchmark circuits, the combination of Huffman coding anal the proposed method provides higher compression rates than. Huffman. coding without the proposed method, run-length. coding, Golomb coding; frequency-directed run-length (FDR) coding and variable-length. input Huffman coding (VIHC).