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为了实现某高速实时系统中的大量数据存储需求,提出了一种基于双倍速率同步动态随机存储器的短周期存储方法.概述了双倍速率同步动态随机存储器控制器的读、写操作基本原理.为了解决数据持续性交替读入和写出存储器且存取顺序不一致的实际问题,设计了一种短周期存储方法.按照数据存取方式的不同可分为单次突发和多次突发2种模式,其中少行多列的存储结构可使多次突发模式下短周期读写速度进一步提高.对基于双倍速率同步动态随机存储器的短周期存储方法进行了性能分析和功能仿真,结果表明,多次突发模式下的短周期存储方法可以少量的现场可编程门阵列片上存储资源和较高的数据读写速率实现存储需求.
In order to achieve a large amount of data storage in a high-speed real-time system, a short-cycle storage method based on double-rate synchronous dynamic random access memory is presented. The basic principle of double-rate synchronous dynamic random access memory controller is described. In order to solve the practical problem that the data is continuously read in and out of the memory and the access sequence is inconsistent, a short-cycle storage method is designed, which can be divided into single burst and multiple burst 2 according to the data access mode Which can improve the short cycle read and write speed under the multiple burst mode.Analyze and simulate the performance of the short cycle storage method based on double rate synchronous dynamic random access memory.The result It shows that the short cycle storage method under multiple burst mode can meet the storage requirements with a small amount of on-chip FPGA resources and a high data read / write rate.