Research of Keypoints of Connecting SDRAM to SOPC

Considering the working condition of SDRAM is strict,in this paper,the point of connecting SDRAM to SOPC is present.It introduces how to design the PCB,and how to chose the working frequency according to the dif-ferent SDRAM and FPGA.Finally,It introduces how to get the clock phrase shift,which makes both SDRAM off the chip and the SDRAM controller work synchronous and work right.