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    • 2. 发明授权
    • Integrated circuit memory devices having improved refresh mode
addressing and methods of operating same
    • 具有改进的刷新模式寻址的集成电路存储器件及其操作方法
    • US6002629A
    • 1999-12-14
    • US206683
    • 1998-12-07
    • Jeon-Kyu KimChang-Hag OhChoong-Sun ParkJeon-Hyoung Lee
    • Jeon-Kyu KimChang-Hag OhChoong-Sun ParkJeon-Hyoung Lee
    • G11C11/403G11C11/406G11C11/408G11C7/00
    • G11C11/4087G11C11/406
    • Integrated circuit memory devices include an array of memory cells and a row address generator circuit which generates first and second different sequences of addresses during first and second refresh modes, respectively, and also repeats at least one of the addresses in the first sequence as an address in the second sequence when transitioning from the first refresh mode to the second refresh mode. The generator circuit may also perform the function of generating row addresses during the first and second refresh modes with the most significant bit of a row address being toggled with each consecutive row address during the first refresh mode. The first refresh mode may be a CAS-before-RAS refresh mode, the second refresh mode may be a self-refresh mode and the address in at least one of the first and second periods of the self-refresh mode may be equivalent to an address in the last period of a preceding CAS-before-RAS refresh mode when transitioning from the first refresh mode to the second refresh mode. This repetition in addressing prevents one or more row of memory cells from being skipped when transitioning from one refresh mode to another refresh mode.
    • 集成电路存储器件包括存储器单元阵列和行地址发生器电路,其分别在第一和第二刷新模式期间产生第一和第二不同的地址序列,并且还将第一序列中的至少一个地址重复为地址 在从第一刷新模式转换到第二刷新模式的第二序列中。 发生器电路还可以执行在第一和第二刷新模式期间产生行地址的功能,其中在第一刷新模式期间行地址的最高有效位与每个连续行地址切换。 第一刷新模式可以是CAS-before-RAS刷新模式,第二刷新模式可以是自刷新模式,并且自刷新模式的第一和第二周期中的至少一个中的地址可以等效于 在从第一刷新模式转换到第二刷新模式时,在先前的CAS-before-RAS刷新模式的最后期间中的地址。 这种在寻址中的重复防止当从一个刷新模式转换到另一刷新模式时跳过一行或多行存储器单元。