基于FPGA的DDR控制器的实现

目前,DDR SDRAM因其拥有比SDRAM双倍的数据速率,已经成为存储器的主流,得到了广泛应用。使用Altera公司的Cyclone FPGA芯片设计实现了一个DDR控制器,为微控制器或数字信号处理器与DDR SDRAM之间连接提供了一种方案。详细叙述了其基本结构和设计思想,并给出了DDR控制器的状态转换图和在设计与实现中应注意的几个问题。

Implementation of DDR Controller Based on FPGA

The DDR SDRAM has been used extensively and become the main product of memory because of its double-data-rata at present.In this paper,we designed and completed a DDR controller by using the Cyclone FPGA device produced by the Altera Corporation,which offered one way to connect the Micro-controller or DSPs with the DDR SDRAM,The main structures and design ideas of a DDR controller are described in detail,and a state switching map is presented in this paper.Finally,some issues on design and implementation are given.The result shows the feasibility of design.