发明授权
US07406640B2 Method and apparatus for testing a ring of non-scan latches with logic built-in self-test
失效
用逻辑内置自检来测试非扫描锁存环的方法和装置
- 专利标题: Method and apparatus for testing a ring of non-scan latches with logic built-in self-test
- 专利标题(中): 用逻辑内置自检来测试非扫描锁存环的方法和装置
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申请号: US11278313申请日: 2006-03-31
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公开(公告)号: US07406640B2公开(公告)日: 2008-07-29
- 发明人: Louis Bernard Bushard , Nathan Paul Chelstrom , Naoki Kiryu , David John Krolak
- 申请人: Louis Bernard Bushard , Nathan Paul Chelstrom , Naoki Kiryu , David John Krolak
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理商 Duke W. Yee; D'Ann N. Rifai; Peter B. Manzo
- 主分类号: G01R31/28
- IPC分类号: G01R31/28
摘要:
A method and apparatus for loading a ring of non-scan latches for a logic built-in self-test. A logic built-in self-test value is loaded into a scannable latch from the logic built-in self-test. An override control signal is asserted in response to loading the logic built-in self-test value into the scannable latch. A non-scan latch is forced to load the logic built-in self-test value from the scannable latch in response to asserting the override control signal. Logic paths in the ring of non-scan latches are exercised. The non-scan latch is part of the logical paths. The test results are captured from the logic paths and the test results are compared against expected test results to determine if the logic paths within the ring of non-scan latches are functioning properly.
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