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    • 3. 发明专利
    • Asic for testing circuit
    • JP4361681B2
    • 2009-11-11
    • JP2000524728
    • 1998-11-23
    • ライトスピード ロジック インコーポレイテッド
    • ロバート オサンアディ スリニヴァサンダナ ハウシェリドハー ムクンド
    • G01R31/28G06F11/22G01R31/3185H03K19/00H03K19/177
    • G01R31/318516
    • A system for testing an integrated circuit, and particularly a gate array, is disclosed which includes, prior to coupling the array to form a user-designed circuit, predesigned logic that enables testing of the user-designed circuit. The predesigned logic allows logic blocks in the array to operate in "freeze" mode or to operate in normal mode, where normal mode is defined by the user-designed circuit. Much of the same circuitry in the logic blocks is, in fact, used in both modes of operation, thus minimizing circuitry added due to test. When the logic blocks are selected to be frozen, the logic blocks behave as a series of daisy-chained master-slave flip-flops. Stimulus data is shifted into the array and captured data is shifted out of the array through the daisy-chained flip-flops. Nonetheless, when data is shifted into and out of the daisy-chained flip-flops, the master latch and the slave latch of each flip-flop can be set to receive independent values and the data captured by each of the master and slave latches can be independently shifted out and analyzed. Although when frozen, the logic blocks behave as daisy-chained flip-flops, use of the logic blocks for testing purposes does not depend upon placement of sequential elements in the user-designed circuit in the logic blocks. In other words, in normal mode, a logic block can implement combinational, sequential, or other functions and still later be used to drive out stimulus values or capture results. Moreover, each logic block is further equipped for addressable mode control, allowing selected logic blocks to be exercised in isolation once stimulus data is shifted in, simplifying test generation and improving fault coverage. Using a logic block in accordance with the invention results in a high level of fault coverage, while placing few limitations on the user's circuit design.
    • 9. 发明专利
    • Data generation method, connection check system, and data generation program
    • 数据生成方法,连接检查系统和数据生成程序
    • JP2008102043A
    • 2008-05-01
    • JP2006285542
    • 2006-10-19
    • Fujitsu Ltd富士通株式会社
    • TOKUNAGA TAKAKAZUTANDA KOICHISHIRAISHI HIROAKIKOHARA YOSHIKATSUTAKATOMI KOJI
    • G01R31/04H01L21/82H03K19/173
    • G01R31/318516G01R31/31717
    • PROBLEM TO BE SOLVED: To perform connection check in accordance with a practical function of all input and output pins even when a number of the input and output pins of a programmable device exist.
      SOLUTION: A data generation method includes: acquiring pin information concerning respective pins of a plurality FPGAs mounted on a board at first (step S101); acquiring set information concerning the connection check (step S102); giving inherent data on each pin as data for the connection check to all the pins outputting data when the pin information and the set information are acquired (step S103); generating a check circuit for checking connection between output pins and input pins by generating input pin information and output pin information including the inherent data to store their information (step S104); and generating ROM data corresponding to the check circuit (step S105).
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:即使存在可编程设备的输入和输出引脚的数量,也可以根据所有输入和输出引脚的实际功能执行连接检查。 解决方案:数据生成方法包括:首先获取关于安装在板上的多个FPGA的各个引脚的引脚信息(步骤S101); 获取关于连接检查的设置信息(步骤S102); 当获取引脚信息和设置信息时,将每个引脚上的固有数据作为连接检查的数据输出到所有输出数据的引脚(步骤S103); 产生检查电路,用于通过产生输入引脚信息和输出包括固有数据的引脚信息来检查输出引脚和输入引脚之间的连接以存储其信息(步骤S104); 生成对应于检查电路的ROM数据(步骤S105)。 版权所有(C)2008,JPO&INPIT