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Partial Scan Design Methods Based on n-Fold Line-Up Structures and the State Justification of Pure Load/Hold Flip-Flops
Toshinori HOSOKAWA Toshihiro HIRAOKA Mitsuyasu OHTA Michiaki MURAOKA Shigeo KUNINOBU
IEICE TRANSACTIONS on Information and Systems
Publication Date: 1998/07/25
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Test and Diagnosis of VLSI)
Category: Design for Testability
design for testability, partial scan design method, n-fold line-up structure, pure load/hold FF,
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We will present a partial scan design method based on n-fold line-up structures in order to achieve high fault efficiency and reduce test pattern generation time for practical LSIs. We will also present a partial scan design method based on the state justification of pure load/hold FFs in order to achieve high fault efficiency and reduce the number of scan FFs for practical LSIs with lots of load/hold FFs. Experimental results for practical LSIs show that our presented methods can achieve high fault efficiency (more than 99%) and reduce the number of scan FFs for the LSI with lots of load/hold FFs.