这几天看了Clifford E. Cummings的两篇大作《Simulation and Synthesis Techniques for Asynchronous FIFO Design》and 《Simulation and Synthesis Techniques for Asynchronous FIFO Design with Asynchronous Pointer Comparisons》颇有感想,真可谓经典之作,不可错过。 1.什么是FIFO? FIFO是英文First In First Out 的缩写...
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外部读写地址线,这样使用起来非常简单,...
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;...
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 Key Words: asynchronous; FIFO; metastable state; Gray code; tie knots France Key Words: asynchronous; FIFO; metastable state; Gray code; tie kno...
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...
由于axis同步fifo太简单,我仅仿真异步的axis的fifo,涉及的文件如下,主要实现了AXIS接口的异步FIFO,可以实现输入输出位宽调整,以及可以实现Frame模式。 axis_adapter.v : Parametrizable bus width adapter axis_async_fifo.v : Parametrizable asynchronous FIFO axis_async_fifo_adapter.v : FIFO/width adapter wrapper...
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
I am using a ZyBo board and used a the FIFO Generator Wizard. I need an asynchronous, continuous writing to a FIFO and reading from the FIFO. This is why I need a write_enable signal and read_enable signal. However, I cannot read from the FIFO. I check to make sure ...