基于SRAM的并行路由算法搜索芯片设计  

Design of a Parallel Routing Algorithm Search Chip Based on SRAM

作　　者：张兵 沈浩杰 项耀阳 靳新波 温芝权 Zhang Bing;Shen Haojie;Xiang Yaoyang;Jin Xinbo;Wen Zhiquan(XeL Technology Inc.,Suzhou 215000,China)

机构地区：[1]苏州雄立科技有限公司,江苏苏州215000

出　　处：《半导体技术》2020年第7期499-504,535,共7页Semiconductor Technology

基　　金：×××预研项目(××××)。

摘　　要：针对三态内容可寻址存储器(TCAM)高成本、高功耗、路由表更新维护复杂以及搜索结果返回单一等问题,提出了一种使用静态随机存储器(SRAM)和自适应矩阵硬件算法逻辑的搜索芯片设计新技术。该技术使用SRAM快速存储路由表项等信息,使用硬件逻辑实现软件算法逻辑功能以提高芯片处理速度。搜索芯片基于UMC 40 nm低功耗1P8M CMOS工艺制造,核心电压为1.1 V,I/O电压为3.3 V,总体芯片面积为200 mm^2。测试结果表明,芯片路由查找时可以快速命中和返回12个并行搜索结果,单搜索性能为500 Msps(million search per second),并行搜索性能为6 Bsps(billion search per second),可用于骨干网络建设和通信领域。Aiming at the problems of high cost, high power consumption, complex maintenance of routing table updates and single return of search results, a new design technique of search chip with static random-access memory(SRAM)and self-adaptive matrix hardware algorithm logic was proposed for ternary content addressable memory(TCAM) technology. SRAM was used to quickly store information such as routing table entries. The hardware logic was also used to implement the software algorithm logic function to improve the chip processing speed. The search chip with an area of 200 mm^2 was fabricated based on UMC 40 nm 1 P8 M CMOS process with low power consumption. The core voltage is 1.1 V, the I/O voltage is 3.3 V. The test results show that the chip routing lookup can quickly hit and return 12 parallel search results, with a single search performance of 500 Msps(million search per second) and a parallel search performance of 6 Bsps(billion search per second), which can be used in backbone network construction and communication fields.

关 键 词：路由查找 三态内容可寻址存储器(TCAM) 并行搜索 静态随机存储器(SRAM) 硬件算法逻辑 

分 类 号：TN492[电子电信—微电子学与固体电子学] TN791