摘要
龙芯SoC第一版本(ICT-E32)中集成的是SDRAM控制器,但鉴于SDRAM性能的限制,使其成为提高龙芯SoC性能的瓶颈.为了进一步提高龙芯SoC性能,在新一款中集成了DDR2控制器.因为DDR2采用了新技术,使其实现相对于SDRAM更为复杂,因此预先在FPGA上对其进行实现,以方便对其在整个SoC设计中的集成.目前,该控制器已经通过功能仿真,并在Xilinx公司的Virtex-4系列FPGA上得以实现.
DDR2 SDRAM offers higher performance and clock frequency than DDE SDRAM. Godson SoC, ICT-E32, integrates a SDRAM Controller, which becomes a bottle-neck of performance improvement because of：the limitation of its manner. To get a high point, we are willing to use a DDR2 Controller in the next Chip. Because of DDR2＇s new features,it is more difficult to be implemented than SDRAM. We firstly design it in a FRGA,, then, it will be easy to be integrated in a SoC. Now, it is implemented in a Xilinx Virtex-4 FPGA, and the design has passed the function simulation.
出处
《江南大学学报（自然科学版）》
CAS
2006年第2期145-148,共4页
Joural of Jiangnan University (Natural Science Edition)
