Cross-coupled write circuit
    1.
    发明授权
    Cross-coupled write circuit 失效
    交叉耦合写电路

    公开(公告)号:US07480189B2

    公开(公告)日:2009-01-20

    申请号:US10251674

    申请日:2002-09-20

    IPC分类号: G11C7/10

    摘要: A write circuit structure may be used to transfer data between global bit lines and local bit lines of a cache. The write circuit structure located between the hierarchical bit lines may be buffers in parallel with P-channel devices in one embodiment or cross-coupled P-channel and N-channel devices in another embodiment.

    摘要翻译: 写电路结构可用于在高速缓存的全局位线和本地位线之间传送数据。 位于分层位线之间的写入电路结构可以是在一个实施例中与P沟道器件并联的缓冲器,或者在另一实施例中可以是交叉耦合的P沟道和N沟道器件。

    Method and apparatus for testing a CAM addressed cache
    3.
    发明授权
    Method and apparatus for testing a CAM addressed cache 失效
    用于测试CAM寻址缓存的方法和装置

    公开(公告)号:US06909651B2

    公开(公告)日:2005-06-21

    申请号:US10803408

    申请日:2004-03-17

    IPC分类号: G11C15/00 G11C29/12 G11C11/00

    CPC分类号: G11C15/00 G11C29/12

    摘要: In one embodiment, an array of content addressable memory (CAM) cells include a first plurality of CAM cells and a second plurality of CAM cells. The second plurality of CAM cells has a width sufficient to address a height of the array. A first plurality of CAM drivers are coupled to the array to drive the first plurality of CAM cells. The first plurality of CAM drivers prevent the first plurality of CAM cells from participating in a match when the array is in a test mode.

    摘要翻译: 在一个实施例中,内容可寻址存储器(CAM)单元的阵列包括第一多个CAM单元和第二多个CAM单元。 第二组多个CAM单元具有足以解决阵列高度的宽度。 第一多个CAM驱动器耦合到阵列以驱动第一多个CAM单元。 当阵列处于测试模式时,第一组多个CAM驱动程序防止第一多个CAM单元参与匹配。

    Method and apparatus for testing a CAM addressed cache
    4.
    发明授权
    Method and apparatus for testing a CAM addressed cache 失效
    用于测试CAM寻址缓存的方法和装置

    公开(公告)号:US06744655B2

    公开(公告)日:2004-06-01

    申请号:US10261395

    申请日:2002-09-30

    IPC分类号: G11C1500

    CPC分类号: G11C15/00 G11C29/12

    摘要: In one embodiment, an array of content addressable memory (CAM) cells include a first plurality of CAM cells and a second plurality of CAM cells. The second plurality of CAM cells has a width sufficient to address a height of the array. A first plurality of CAM drivers are coupled to the array to drive the first plurality of CAM cells. The first plurality of CAM drivers prevent the first plurality of CAM cells from participating in a match when the array is in a test mode.

    摘要翻译: 在一个实施例中,内容可寻址存储器(CAM)单元的阵列包括第一多个CAM单元和第二多个CAM单元。 第二组多个CAM单元具有足以解决阵列高度的宽度。 第一多个CAM驱动器耦合到阵列以驱动第一多个CAM单元。 当阵列处于测试模式时,第一组多个CAM驱动程序防止第一多个CAM单元参与匹配。

    Method and apparatus for testing a CAM addressed cache
    6.
    发明授权
    Method and apparatus for testing a CAM addressed cache 失效
    用于测试CAM寻址缓存的方法和装置

    公开(公告)号:US06487131B1

    公开(公告)日:2002-11-26

    申请号:US09475491

    申请日:1999-12-30

    IPC分类号: G11C700

    CPC分类号: G11C15/00 G11C29/12

    摘要: In one embodiment, an array of content addressable memory (CAM) cells include a first plurality of CAM cells and a second plurality of CAM cells. The second plurality of CAM cells has a width sufficient to address a height of the array. A first plurality of CAM drivers are coupled to the array to drive the first plurality of CAM cells. The first plurality of CAM drivers prevent the first plurality of CAM cells from participating in a match when the array is in a test mode.

    摘要翻译: 在一个实施例中,内容可寻址存储器(CAM)单元的阵列包括第一多个CAM单元和第二多个CAM单元。 第二组多个CAM单元具有足以解决阵列高度的宽度。 第一多个CAM驱动器耦合到阵列以驱动第一多个CAM单元。 当阵列处于测试模式时,第一组多个CAM驱动程序防止第一多个CAM单元参与匹配。

    Low power cache operation through the use of partial tag comparison
    7.
    发明授权
    Low power cache operation through the use of partial tag comparison 失效
    低功耗缓存操作通过使用部分标签进行比较

    公开(公告)号:US06449694B1

    公开(公告)日:2002-09-10

    申请号:US09362919

    申请日:1999-07-27

    IPC分类号: G06F1200

    摘要: A method for conserving power during a cache memory operation is disclosed. The validity and the parity of the tag address are checked. If the tag is invalid or the parity bit does not check, the tag is not read and a tag comparison is not performed, such that the data is accessed from the main memory. Otherwise, the tag address bits are selected in a plurality of tag subsets. A first tag subset of the plurality of tag subsets is compared with a respective first subset of the tag field of the memory address bits. A first compare signal indicative of the result of the first comparison is outputted. The cache memory operation is interrupted if the first compare signal indicates the first tag subset does not match the respective first subset of the tag field of the memory address.

    摘要翻译: 公开了一种用于在高速缓存存储器操作期间节省功率的方法。 检查标签地址的有效性和奇偶校验。 如果标签无效或奇偶校验位未检查,则不读取标签并且不执行标签比较,使得从主存储器访问数据。 否则,在多个标签子集中选择标签地址位。 将多个标签子集中的第一标签子集与存储器地址位的标签字段的相应第一子集进行比较。 输出表示第一比较结果的第一比较信号。 如果第一比较信号指示第一标签子集与存储器地址的标签字段的相应第一子集不匹配,则高速缓存存储器操作被中断。