Improving bus test via I/sub DDT/ and boundary scan
2001
This paper presents a systematic test methodology targeting bus line interconnect defects using I/sub DDT/ testing and boundary scan. The traditional test is unable to detect all possible defects, especially timing-related faults. Open and short defects on interconnects between embedded modules can be detected by I/sub DDT/ testing. Boundary scan can provide accessibility to internal buses. A statistical analysis is presented discussing the uncertain factors due to process variations and power fluctuation. The effectiveness of the proposed technique on shorts, opens or the other non stuck-at fault type defects is also illustrated.
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