Invention Grant
US08091002B2 Multiple-capture DFT system to reduce peak capture power during self-test or scan test
失效
多捕捉DFT系统,可在自检或扫描测试期间降低峰值捕获能力
- Patent Title: Multiple-capture DFT system to reduce peak capture power during self-test or scan test
- Patent Title (中): 多捕捉DFT系统,可在自检或扫描测试期间降低峰值捕获能力
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Application No.: US12797302Application Date: 2010-06-09
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Publication No.: US08091002B2Publication Date: 2012-01-03
- Inventor: Laung-Terng Wang , Shianling Wu , Zhigang Jiang , Jinsong Liu , Hao-Jan Chao , Lizhen Yu , Feifei Zhao , Fangfang Li , Jianping Yan
- Applicant: Laung-Terng Wang , Shianling Wu , Zhigang Jiang , Jinsong Liu , Hao-Jan Chao , Lizhen Yu , Feifei Zhao , Fangfang Li , Jianping Yan
- Applicant Address: US CA Sunnyvale
- Assignee: Syntest Technologies, Inc.
- Current Assignee: Syntest Technologies, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Bacon & Thomas, PLLC
- Main IPC: G01R31/28
- IPC: G01R31/28

Abstract:
A method for providing ordered capture clocks to detect or locate faults within N clock domains and faults crossing any two clock domains in an integrated circuit or circuit assembly in scan-test or self-test mode, where N>1, each clock domain having one capture clock and a plurality of scan cells, each capture clock comprising a plurality of capture clock pulses; said method comprising: (a) generating and shifting-in N test stimuli to all said scan cells within said N clock domains in said integrated circuit or circuit assembly during a shift-in operation; (b) applying an ordered sequence of capture clocks to all said scan cells within said N clock domains, the ordered sequence of capture clocks comprising at least a plurality of capture clock pulses from two or more selected capture clocks placed in a sequential order such that all clock domains are never triggered simultaneously during a capture operation; and (c) analyzing output responses of all said scan cells to locate any faults therein.
Public/Granted literature
- US20100287430A1 MULTIPLE-CAPTURE DFT SYSTEM TO REDUCE PEAK CAPTURE POWER DURING SELF-TEST OR SCAN TEST Public/Granted day:2010-11-11
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