FPGA中同步FIFO的使用小结，FPGA中的FIFO，分为同步FIFO，异步FIFO和双向FIFO。同步FIFO一般用于数据的缓存，异步FIFO一般用于跨时钟域的同步上。-FPGA use in synchronous FIFO summary, FPGA' s FIFO, divided into synchronous FIFO, Asynchronous FIFO and two-way FIFO. Generally used for data synchronization b