本文大部分内容来自Clifford E. Cummings的《Simulation and Synthesis Techniques for Asynchronous FIFO Design》,经过自己的一些改变,理论部分为转载,代码自己完成。 一、FIFO简介 FIFO是英文First In First Out 的缩写,是一种先进先出的数据缓存器,它与普通存储器的区别是没有
上一讲我们介绍了同步FIFO的设计以及仿真,这一讲我们开始异步FIFO的学习,主要是根据Clifford的神作《Simulation and Synthesis Techniques for Asynchronous FIFO Design 》,这是一篇讲解异步FIFO设计的论文。 一、异步FIFO简介 异步FIFO指的是:数据从一个时钟域写入FIFO,而从另一个时钟域读出,并且这两个时钟域是异步的。
1:0;43//Asynchronous reset,synch release44//always @(posedge clk)begin45//rst_nr <= rst_n;46//end47//FIFO_CNT48always@(posedgeclkornegedgerst_n)begin49if(!rst_n)50fifo_cnt <=0;51elseif((!buf_full&&wr_en)&&(!buf_empty&&rd_en))//WRTITE & READ ,HOLD52fifo_cnt <=fifo_cnt;...
asynchronouscombinationofquadrantdetectionempty/fullflag,then asynchronousempty/fullflagsynchronizedtothecorrespondingclock domain.Thesimulationresultsthatthemethodisstableandeffective. KeyWords:asynchronous;FIFO;metastablestate;Graycode;tie knotsFrance II 目录 1引 言... 11.1FIFO研究意 义...11.2生产需 求状况.....
This paper introduces two common challenges in designing asynchronous FIFO: semi-stable state and glitch. And from the semi-stable state and the glitch how to produce and how to affect the circuit analysis, proposed the corresponding solution. This paper introduces three codes: binary code, gray ...
Key Words: asynchronous; FIFO; metastable state; Gray code; tie knots France 目录 1引言1 1.1 FIFO研究意义1 1.2生产需求状况1 1.3存储器外发展状况2 1.4 FIFO设计技术简介4 1.4.1基于信元的FIFO设计方法4 1.4.2基于SRAM/DRAM的大容量FIFO的设计与实现4 1.5异步FIFO设计中存在的问题及解决办法5 1.5.1亚稳...
Verilog实验单端口RAM、简单双端口RAM、真双端口RAM、同步FIFO和异步FIFO模块。能够完全替代Xilinx官方IP核。软件版本:Vivado2018.3。 - mfkiwl/RAM_FIFO
本文提出一种新颖的异步FIFO设计方案,它通过先比较读写地址并结合象限检测法产生异步的空/满标志,再把异步的空/满标志同步到相应的时钟域。通过仿真验证,该方法是稳定有 6、效的。关键词:异步;FIFO;亚稳态;格雷码;结绳法Design and accomplishasynchronous FIFO based on Verilog HDLAbstractIn modern IC design, ...
rtl/async_fifo.v: a basic asynchronous dual-clock FIFO rtl/async_bidir_fifo.v: two instance of the first one into a single top level for full-duplex channel rtl/async_bidir_ramif_fifo.v: same than previous but with external RAM
【Verilog】Gray Code Counter 格雷码计数器 Gray code counters (having one bit change per counter transition) are often used in FIFO design and digital communication. Here I will show two styles gray code counter. Style #1 First style gray code counter uses a single set of flip-flops as the ...