CAM的设计与应用研究  

Designing and Application Research of Content Addressable Memory

作　　者：章琪[1] 李斌[1] 

机构地区：[1]沈阳理工大学信息科学与工程学院,辽宁沈阳110159

出　　处：《沈阳理工大学学报》2011年第3期17-19,共3页Journal of Shenyang Ligong University

摘　　要：计算机通常以顺序比对的方式进行查找,内容可寻址存储器(CAM)作为一种特殊的高速存储器,只需一次并行比对即可直接得到匹配的结果,速度远远大于顺序查找。介绍了CAM的电路结构,提出了一种基于FPGA的内容可寻址存储器(CAM)的设计方法,使用锁存器对CAM进行设计,并应用于MAC地址的查询。经仿真证明该CAM运行频率能够达到245.42MHz,满足现行网络吞吐率的要求,且配置灵活,易于扩展.The Computers usually query data by sequence comparison,Content-addressable memory（CAM） is a special type of computer memory used in certain very high speed searching applications,it only takes one time to compare and get the matching result directly,and is faster than sequence comparison searching.The circuit structure of CAM and a design of CAM based on FPGA is presented in this paper.It can be applied to data matching and MAC address query in communication and The feature of the design is flexible in expanding of depth and word-width in the CAM and meeting the requirements of the network throughput rate.

关 键 词：内容可寻址存储器 锁存器 现场可编程门阵列 MAC 

分 类 号：TN919[电子电信—通信与信息系统]