Selective per-cycle masking of scan chains for system level test
    1.
    发明授权
    Selective per-cycle masking of scan chains for system level test 有权
    用于系统级测试的扫描链选择性每周期屏蔽

    公开(公告)号:US08726113B2

    公开(公告)日:2014-05-13

    申请号:US13453929

    申请日:2012-04-23

    IPC分类号: G01R31/28

    摘要: Built-in self-test techniques for integrated circuits that address the issue of unknown states. Some implementations use a specialized scan chain selector coupled to a time compactor. The presence of the specialized scan chain selector increases the efficiency in masking X states. Also disclosed are: (1) an architecture of a selector that works with multiple scan chains and time compactors, (2) a method for determining and encoding per cycle scan chain selection masks used subsequently to suppress X states, and (3) a method to handle an over-masking phenomenon.

    摘要翻译: 用于处理未知状态问题的集成电路的内置自检技术。 一些实现使用与时间压缩器相连的专用扫描链选择器。 专门的扫描链选择器的存在提高了掩蔽X状态的效率。 还公开了:(1)与多个扫描链和时间压实器一起工作的选择器的架构,(2)用于确定和编码随后抑制X状态的每个周期扫描链选择掩模的方法,以及(3) 以处理过度掩蔽现象。

    Selective per-cycle masking of scan chains for system level test
    5.
    发明授权
    Selective per-cycle masking of scan chains for system level test 有权
    用于系统级测试的扫描链选择性每周期屏蔽

    公开(公告)号:US08166359B2

    公开(公告)日:2012-04-24

    申请号:US12341996

    申请日:2008-12-22

    IPC分类号: G01R31/28

    摘要: Built-in self-test techniques for integrated circuits that address the issue of unknown states. Some implementations use a specialized scan chain selector coupled to a time compactor. The presence of the specialized scan chain selector increases the efficiency in masking X states. Also disclosed are: (1) an architecture of a selector that works with multiple scan chains and time compactors, (2) a method for determining and encoding per cycle scan chain selection masks used subsequently to suppress X states, and (3) a method to handle an over-masking phenomenon.

    摘要翻译: 用于处理未知状态问题的集成电路的内置自检技术。 一些实现使用与时间压缩器相连的专用扫描链选择器。 专门的扫描链选择器的存在提高了掩蔽X状态的效率。 还公开了:(1)与多个扫描链和时间压实器一起工作的选择器的架构,(2)用于确定和编码随后抑制X状态的每个周期扫描链选择掩模的方法,以及(3) 以处理过度掩蔽现象。

    Low power scan testing techniques and apparatus
    9.
    发明授权
    Low power scan testing techniques and apparatus 有权
    低功耗扫描测试技术和设备

    公开(公告)号:US08290738B2

    公开(公告)日:2012-10-16

    申请号:US13049844

    申请日:2011-03-16

    IPC分类号: G06F19/00

    CPC分类号: G01R31/318575

    摘要: Disclosed below are representative embodiments of methods, apparatus, and systems used to reduce power consumption during integrated circuit testing. Embodiments of the disclosed technology can be used to provide a low power test scheme and can be integrated with a variety of compression hardware architectures (e.g., an embedded deterministic test (“EDT”) architecture). Among the disclosed embodiments are integrated circuits having programmable test stimuli selectors, programmable scan enable circuits, programmable clock enable circuits, programmable shift enable circuits, and/or programmable reset enable circuits. Exemplary test pattern generation methods that can be used to generate test patterns for use with any of the disclosed embodiments are also disclosed.

    摘要翻译: 以下公开了用于在集成电路测试期间降低功耗的方法,装置和系统的代表性实施例。 所公开的技术的实施例可以用于提供低功率测试方案,并且可以与各种压缩硬件架构(例如,嵌入式确定性测试(EDT)架构)集成)。 在所公开的实施例中,具有可编程测试刺激选择器,可编程扫描使能电路,可编程时钟使能电路,可编程移位使能电路和/或可编程复位使能电路的集成电路。 还公开了可以用于产生用于与任何所公开的实施例一起使用的测试图案的示例性测试图形生成方法。

    DECOMPRESSORS FOR LOW POWER DECOMPRESSION OF TEST PATTERNS
    10.
    发明申请
    DECOMPRESSORS FOR LOW POWER DECOMPRESSION OF TEST PATTERNS 有权
    用于测试模式的低功率分解的分解器

    公开(公告)号:US20100138708A1

    公开(公告)日:2010-06-03

    申请号:US12641150

    申请日:2009-12-17

    IPC分类号: G01R31/3177 G06F11/25

    摘要: Disclosed below are representative embodiments of methods, apparatus, and systems used to generate test patterns for testing integrated circuits. Embodiments of the disclosed technology can be used to provide a low power test scheme and can be integrated with a variety of compression hardware architectures (e.g., an embedded deterministic test (“EDT”) environment). Certain embodiments of the disclosed technology can reduce the switching rates, and thus the power dissipation, in scan chains with no hardware modification. Other embodiments use specialized decompression hardware and compression techniques to achieve low power testing.

    摘要翻译: 以下公开了用于产生用于测试集成电路的测试图案的方法,装置和系统的代表性实施例。 所公开的技术的实施例可以用于提供低功率测试方案,并且可以与各种压缩硬件架构(例如,嵌入式确定性测试(“EDT”)环境)集成。 所公开的技术的某些实施例可以在没有硬件修改的情况下降低扫描链中的开关速率,从而降低功耗。 其他实施例使用专门的减压硬件和压缩技术来实现低功率测试。