System and method to reduce LBIST manufacturing test time of integrated circuits
    1.
    发明授权
    System and method to reduce LBIST manufacturing test time of integrated circuits 失效
    减少LBIST制造测试时间集成电路的系统和方法

    公开(公告)号:US07519889B1

    公开(公告)日:2009-04-14

    申请号:US12060339

    申请日:2008-04-01

    IPC分类号: G01R31/28

    CPC分类号: G01R31/318385

    摘要: A method to reduce logic built in self test manufacturing test time of integrated circuits, comprising: loading a plurality of test seeds in bulk into a locally accessible on-chip memory array locally disposed on an integrated circuit, each of the plurality of test seeds is associated with a set of LBIST control information; sending the plurality of test seeds from the locally accessible on-chip memory array repetitively into a pseudo-random pattern generator one at a time during an LBIST operation being under the control from the set of LBIST control information; generating random bit streams serially into a plurality of parallel shift registers of the integrated circuit through the use of the plurality of test seeds; and performing a logic built-in self test on a plurality of logic blocks in the integrated circuit to detect defects within the integrated circuit.

    摘要翻译: 一种减少集成电路的自检制造测试时间内置逻辑的方法,其特征在于包括:将大量测试种子加载到本地可访问的本地设置在集成电路上的片上存储器阵列中, 与一组LBIST控制信息相关联; 在LBIST控制信息的集合控制下的LBIST操作期间,一次一个地将多个测试种子从本地可访问的片上存储器阵列发送到伪随机模式生成器中; 通过使用多个测试种子将随机比特流串行地生成到集成电路的多个并行移位寄存器中; 以及对所述集成电路中的多个逻辑块执行逻辑内置自检以检测所述集成电路内的缺陷。