一种异步FIFO数据余量检测方法

Method for Detecting Number of Data Stored in Asynchronous FIFO

通过分析同步FIFO数据余量的检测方法,提出了一种异步FIFO数据余量的检测方法,并分析了所涉及到的亚稳态问题和边界问题。最后用Verilog HDL语言实现并进行了仿真验证。实验表明,此方案可实时有效地检测异步FIFO中的数据余量。

By analyzing the method for detecting the amount of data stored in synchronous FIFO, a method for detecting number of data stored in asynchronous FIFO is presented in this paper. Meanwhile, the metastable question generated by data transfer and boundary question are analyzed and resolved. The design is realized with Verilog HDL language, finally it is completed and simulated, and the result shoots that the design is valid. The experimental results show that this scheme can effectively detect the data margin in asynchrorous FIFO.