说明：  这主要是在学习FPGA设计过程中的笔记.主要是：FPGA设计中的电源管理，关键问题，PLDFPGA结构与原理初步的认识，以及如何养成良好的编程习惯、大型设计中FPGA的多时钟设计策略及其概念：毛刺、竞争、冒险。
(This is mainly to learn FPGA design process in the notes. Is mainly: FPGA design, power management, the key question, PLDFPGA preliminary understanding of the structure and principles, and how to develop good programming habits, large-scale design of multi-FPGA clock design strategy and concept: the burr, competition, adventure.)