发明名称 |
INTEGRATED CIRCUIT TESTING WITH POWER COLLAPSED |
摘要 |
Provided are apparatus and methods for testing an integrated circuit. In an exemplary method for testing an integrated circuit, a test controller and a power manager are integrated into a main power domain of the integrated circuit. The test controller can be Joint Test Action Group-compatible. An isolation signal is generated using the power manager. The isolation signal can comprise at least one of a freeze signal configured to isolate an input-output port of the integrated circuit, and a clamp signal configured to isolate a functional module of the integrated circuit. The isolation signal can be stored in a boundary scan register controlled with the test controller. The main power domain is isolated from a power-collapsible domain of the integrated circuit with the isolation signal. Power of the power-collapsible domain is collapsed. When power is collapsed, the power-collapsible domain is tested using the test controller and the power manager. The testing of the power-collapsible domain can comprise testing a power supply current. When power to the power-collapsible domain is collapsed, a level shifter output can be held constant to an output level based on a pre-collapse input from the power-collapsible domain. |
申请公布号 |
US2014223250(A1) |
申请公布日期 |
2014.08.07 |
申请号 |
US201414172292 |
申请日期 |
2014.02.04 |
申请人 |
QUALCOMM Incorporated |
发明人 |
Chen Wei;Tao Yucong;Severson Matthew L.;Gemar Jeffrey R.;Yang Chang Yong |
分类号 |
G01R31/3177 |
主分类号 |
G01R31/3177 |
代理机构 |
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代理人 |
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主权项 |
1. A method for testing an integrated circuit, comprising:
integrating a test controller and a power manager into a main power domain of the integrated circuit; generating an isolation signal using the power manager; isolating the main power domain from a power-collapsible domain of the integrated circuit with the isolation signal; collapsing power of the power-collapsible domain; and testing the power-collapsible domain, when power is collapsed, using the test controller and the power manager. |
地址 |
San Diego CA US |