发明名称 |
DIAGNOSABLE SCAN CHAIN |
摘要 |
A method and system for locating connector defects in a defective scan chain that has a parallel non-defective scan chain on a different wiring level, with both scan chains being laid out in a regular array pattern. A predetermined bit sequence is scanned into the defective scan chain. The contents of the defective scan chain are then parallel shifted into the non-defective scan chain. The contents of the non-defective scan chain is then scanned out and compared with the predetermined bit sequence. The comparison of the scanned out bits with the predetermined bit sequence facilitates locating both physically and logically where a connector defect has occurred in the defective scan chain.
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申请公布号 |
US2004268195(A1) |
申请公布日期 |
2004.12.30 |
申请号 |
US20030604194 |
申请日期 |
2003.06.30 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
EUSTIS STEVEN MICHAEL;PASTEL LEAH MARIE PFEIFER;BEDNAR THOMAS RICHARD;SOPCHAK THOMAS GREGORY;OPPOLD JEFFERY HOWARD |
分类号 |
G01R31/3185;(IPC1-7):G01R31/28 |
主分类号 |
G01R31/3185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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