A Filling Methodology for Efficient Compaction of Test Responses with Unknowns.
碩士 === 淡江大學 === 電機工程學系碩士在職專班 === 98 === Reducing test application time and test data volume are major cost factor in SoC design. Currently, scan-based testing is widely adopted on SoC test, a large number of scan cells coupled with a large number of scan patterns have inflated test data volume and t...
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ndltd-TW-098TKU054420112015-10-13T18:20:59Z http://ndltd.ncl.edu.tw/handle/64068298656398651689 A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. 對測試反饋資料中未知向量資料的X填入方法 Chih-Ping Su 蘇志平 碩士 淡江大學 電機工程學系碩士在職專班 98 Reducing test application time and test data volume are major cost factor in SoC design. Currently, scan-based testing is widely adopted on SoC test, a large number of scan cells coupled with a large number of scan patterns have inflated test data volume and test application time. To reduce the test cost, test data compression solutions are used. In general solution, a few number of scan-in channels drive a large number of internal scan chains through decompressor, while the responses collected from the internal scan chains are taken through compactor that drives a few number of scan-out channels. There are many unknown x-bits are generated and collected into compactor after testing, it will be increased the test time and difficulty that the ATE (Automatic Test Equipment) judges. In this paper, we propose a method to fill fixed value into these unknown x-bits of internal scan chains output and then output to compactor. The method is performed prefix aim at the test data of internal scan chains output and then utilize ATE vector repeat function to compress the test data reducing the test data volume that stored in the ATE vector memory. Jiann-Chyi Rau 饒建奇 2010 學位論文 ; thesis 33 en_US |
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碩士 === 淡江大學 === 電機工程學系碩士在職專班 === 98 === Reducing test application time and test data volume are major cost factor in SoC design. Currently, scan-based testing is widely adopted on SoC test, a large number of scan cells coupled with a large number of scan patterns have inflated test data volume and test application time. To reduce the test cost, test data compression solutions are used. In general solution, a few number of scan-in channels drive a large number of internal scan chains through decompressor, while the responses collected from the internal scan chains are taken through compactor that drives a few number of scan-out channels. There are many unknown x-bits are generated and collected into compactor after testing, it will be increased the test time and difficulty that the ATE (Automatic Test Equipment) judges. In this paper, we propose a method to fill fixed value into these unknown x-bits of internal scan chains output and then output to compactor. The method is performed prefix aim at the test data of internal scan chains output and then utilize ATE vector repeat function to compress the test data reducing the test data volume that stored in the ATE vector memory.
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author2 |
Jiann-Chyi Rau |
author_facet |
Jiann-Chyi Rau Chih-Ping Su 蘇志平 |
author |
Chih-Ping Su 蘇志平 |
spellingShingle |
Chih-Ping Su 蘇志平 A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
author_sort |
Chih-Ping Su |
title |
A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
title_short |
A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
title_full |
A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
title_fullStr |
A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
title_full_unstemmed |
A Filling Methodology for Efficient Compaction of Test Responses with Unknowns. |
title_sort |
filling methodology for efficient compaction of test responses with unknowns. |
publishDate |
2010 |
url |
http://ndltd.ncl.edu.tw/handle/64068298656398651689 |
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