基于AMBA总线的DDR2 SDRAM控制器研究与实现

Study and Implementation of DDR2 SDRAM Controller Based on AMBA Bus

随着大规模集成电路和高速、低功耗、高密度存贮技术的发展,DDR存贮器业已成为PC内存的主流技术。作为第二代DDR存贮器DDR2预取位数是普通DDR的两倍。因此DDR2 SDRAM将取代DDR SDRAM的主流地位。本文对DDR2存贮技术进行了探讨,并讨论了DDR2 SDRAM和DDR SDRAM的区别以及设计时应注意的问题,设计了一个基于AMBA总线的DDR2 SDRAM控制器并提出了一种数据顺序预读取机制,使得DDR2 SDRAM的访问效率大大提高。

DDR2 SDRAM has been a popular device Used as PC memory, and it begins to challenge the status of DDR SDRAM. At the same time, with the development of ARM, AMBA bus becomes a standard for embedded design. So, a DDR2 SDRAM interface based on AHB BUS is designed in this paper.