Invention Grant
US09470756B1 Method for using sequential decompression logic for VLSI test in a physically efficient construction
有权
在物理有效的结构中使用顺序解压缩逻辑进行VLSI测试的方法
- Patent Title: Method for using sequential decompression logic for VLSI test in a physically efficient construction
- Patent Title (中): 在物理有效的结构中使用顺序解压缩逻辑进行VLSI测试的方法
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Application No.: US14738765Application Date: 2015-06-12
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Publication No.: US09470756B1Publication Date: 2016-10-18
- Inventor: Steev Wilcox , Brian Edward Foutz , Krishna Vijaya Chakravadhanula , Vivek Chickermane , Paul Alexander Cunningham
- Applicant: Cadence Design Systems, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cadence Design Systems, Inc.
- Current Assignee: Cadence Design Systems, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Kenyon & Kenyon LLP
- Main IPC: G01R31/28
- IPC: G01R31/28 ; G01R31/3177

Abstract:
Methods, systems, and integrated circuits for decompressing a set of scan input data in a Design for Test (DFT) application, in which implementation may include determining a number of scan inputs to applied circuit from automated test equipment (ATE). Based on the number of scan inputs, another aspect of implementation may involve generating a 2-dimensional grid on the integrated circuit (IC). Another implementation aspect may involve decompressing the scan inputs from the ATE according to decompression logic that is sequentially distributed such that the grid can locally apply the last stage of the decompression logic. In accordance with aspects of the method, the physical structure of an IC decompression logic is more accessible to individual scan chains and reduces congestion on board the IC.
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