Here we have not considered the sychnronizing latency if Write and Read clocks are Asynchronous. Greater the Synchronizing latency, higher the FIFO size requirement to buffer more additional data written.

• 这里，我们没有考虑由于异步读写需要同步，所引入的延时。越大的延时，需要越大的FIFO来缓冲更多和写数据。