一种异步FIFO数据余量检测方法  

Method for Detecting Number of Data Stored in Asynchronous FIFO

作　　者：宋建港[1] 宋英雄[1] 张俊杰[1] 

机构地区：[1]上海大学特种光纤与光接入网教育部重点实验室,上海200072

出　　处：《电视技术》2011年第15期81-83,共3页Video Engineering

基　　金：上海市科委"科技创新行动计划"2008年度信息技术领域重大科技项目(08706201000);上海市科委2008年度"上海-应用材料研究与发展基金"国际合作项目(08700741000);上海市教委重点学科建设项目(J50104)

摘　　要：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.

关 键 词：异步FIFO 格雷码 亚稳态 数据余量 

分 类 号：TN915[电子电信—通信与信息系统]