本文档对Xilinx 公司FPGA开发环境中ISE中如何调用DDR2 IP进行了详细的说明。直接例化IPCORE,采用无TESTBENCH，无PLL的方式.-This document FPGA from Xilinx ISE development environment how to call DDR2 IP for a detailed descr iption. Direct instantiation IPCORE, no-TESTBENCH, no PLL ways.