Xilinx公司开发板中的一个模块，在时钟的上升和下降沿同时传输数据。使用时需要在ISE集成开发环境下利用VHDL进行例化。本文是对该模块功能的说明，是个人的学习总结-Xilinx has developed a module board, in the clock' s rising and falling at the same time transmission of data. ISE needs to use integrated development environment for the use of VHDL-based cases. This article is a descr iption of the module function is to sum up the individual learning