公开(公告)号：US20140104914A1

公开(公告)日：2014-04-17

申请号：US14043852

申请日：2013-10-02

Applicant: MEDIATEK INC.

Inventor： Rei-Fu Huang ,  Hang-Kaung Shu

IPC: G11C15/00

CPC classification number: G11C15/00 ,  G11C15/04 ,  G11C29/848

Abstract: A content addressable memory (CAM) has a CAM array, a path selection circuit and a control circuit. The CAM array has a plurality of main columns of CAM cells and at least one redundant column of CAM cells. The path selection circuit receives an input search data, and outputs a plurality of bits of the input search data to a plurality of selected columns in the CAM array, respectively. The control circuit controls the path selection circuit to couple to the selected columns, and sets each CAM cell of at least one faulty column found in the main columns at a match state. The at least one faulty column is not included in the selected columns, and the at least one redundant column is included in the selected columns.

Abstract translation: 内容可寻址存储器（CAM）具有CAM阵列，路径选择电路和控制电路。 CAM阵列具有CAM单元的多个主列和至少一个CAM单元冗余列。 路径选择电路接收输入搜索数据，并将输入的搜索数据的多个比特分别输出到CAM阵列中的多个选择的列。 控制电路控制路径选择电路耦合到所选择的列，并将主列中发现的至少一个故障列的每个CAM单元设置为匹配状态。 所选择的列中不包括至少一个故障列，并且至少一个冗余列被包括在所选择的列中。

公开(公告)号：US09128865B2

公开(公告)日：2015-09-08

申请号：US14037340

申请日：2013-09-25

Applicant: MEDIATEK INC.

Inventor： Hang-Kaung Shu ,  Kuan-Hong Lin ,  Chi-Wei Peng

IPC: H03M13/00 ,  G06F11/10

CPC classification number: G06F11/1008 ,  G06F11/1064

Abstract: A method for managing data stored in a content addressable memory (CAM) device includes at least the following steps: performing a partial write operation to overwrite only a portion of original write data stored in an entry of the CAM device, and storing updated write data in the entry; and updating a parity flag by a first value to indicate that parity data corresponding to the entry of the CAM device is invalid. Besides, a CAM system employing the method has a CAM device, a storage device and a parity flag controller.

Abstract translation: 用于管理存储在内容可寻址存储器（CAM）设备中的数据的方法至少包括以下步骤：执行部分写入操作以仅覆盖存储在CAM设备的条目中的原始写入数据的一部分，并且存储更新的写入数据 在入场; 以及将奇偶校验标志更新为第一值以指示与CAM设备的条目相对应的奇偶校验数据无效。 此外，采用该方法的CAM系统具有CAM设备，存储设备和奇偶校验标志控制器。

公开(公告)号：US09013907B2

公开(公告)日：2015-04-21

申请号：US14043852

申请日：2013-10-02

Applicant: Mediatek Inc.

Inventor： Rei-Fu Huang ,  Hang-Kaung Shu

IPC: G11C15/00

CPC classification number: G11C15/00 ,  G11C15/04 ,  G11C29/848

Abstract: A content addressable memory (CAM) has a CAM array, a path selection circuit and a control circuit. The CAM array has a plurality of main columns of CAM cells and at least one redundant column of CAM cells. The path selection circuit receives an input search data, and outputs a plurality of bits of the input search data to a plurality of selected columns in the CAM array, respectively. The control circuit controls the path selection circuit to couple to the selected columns, and sets each CAM cell of at least one faulty column found in the main columns at a match state. The at least one faulty column is not included in the selected columns, and the at least one redundant column is included in the selected columns.

Abstract translation: 内容可寻址存储器（CAM）具有CAM阵列，路径选择电路和控制电路。 CAM阵列具有CAM单元的多个主列和至少一个CAM单元冗余列。 路径选择电路接收输入搜索数据，并将输入的搜索数据的多个比特分别输出到CAM阵列中的多个选择的列。 控制电路控制路径选择电路耦合到所选择的列，并将主列中发现的至少一个故障列的每个CAM单元设置为匹配状态。 所选择的列中不包括至少一个故障列，并且至少一个冗余列被包括在所选择的列中。

公开(公告)号：US20140108884A1

公开(公告)日：2014-04-17

申请号：US14037340

申请日：2013-09-25

Applicant: MEDIATEK INC.

Inventor： Hang-Kaung Shu ,  Kuan-Hong Lin ,  Chi-Wei Peng

IPC: G06F11/10

CPC classification number: G06F11/1008 ,  G06F11/1064

Abstract: A method for managing data stored in a content addressable memory (CAM) device includes at least the following steps: performing a partial write operation to overwrite only a portion of original write data stored in an entry of the CAM device, and storing updated write data in the entry; and updating a parity flag by a first value to indicate that parity data corresponding to the entry of the CAM device is invalid. Besides, a CAM system employing the method has a CAM device, a storage device and a parity flag controller.

Abstract translation: 用于管理存储在内容可寻址存储器（CAM）设备中的数据的方法至少包括以下步骤：执行部分写入操作以仅覆盖存储在CAM设备的条目中的原始写入数据的一部分，并且存储更新的写入数据 在入场; 以及将奇偶校验标志更新为第一值以指示与CAM设备的条目相对应的奇偶校验数据无效。 此外，采用该方法的CAM系统具有CAM设备，存储设备和奇偶校验标志控制器。