一个SDRAM控制器的参考设计vhdl语言，包含了全部逻辑功能代码以及约束文件，包括一些综合布线后的文件和波形，有较高的参考价值。-A SDRAM controller reference design vhdl language contains all logic code as well as the constraints file, including files and waveform integrated wiring, there is a high reference val