FPGA Asynchronous FIFO设计思路(2) 首先讨论格雷码的编码方式: 先看4bit的格雷码,当MSB为0时,正向计数,当MSB为1时,即指针已经走过一遍了,最高位翻转,此时的格雷码是反向计数,这其中整套数据以最大值(深度)为对称中心,每一个数均符合格雷码的要求,即下一个状态比上一个状态只有1bit的变化。 3bit的格雷码,在最...
FPGA Asynchronous FIFO设计思路 将一个多位宽,且在不停变化的数据从一个时钟域传递到另一个时钟域是比较困难的。 同步FIFO的指针比较好确定,当FIFO counter达到上限值时候,FIFO为满,当FIFO counter为0时,FIFO为空。 异步FIFO有writer pointer和read pointer两个指针,writer pointer总是指向下一个要被写入的位置,re...
异步FIFO_Asynchronous FIFO
This paper introduces three codes: binary code, gray code and shift code. In this paper, we use Verilog HDL language and use these three different codes to design the FIFO empty and full state judgment module, thus solving the challenge of glitch. The semi-stable state challenge is solved ...
It applies true synchronous reset to block RAM though the FIFO receives the asynchronous reset. There will not be a situation where some part of logic is out of reset and some part is still in reset as long as its wr_rst_busy signal is used by the design to hold the data flow. The...
The simulation testcases available useIcarus VerilogandSVUTtool to run the tests. The FIFO is fully functional and used in many successful projects. Usage RTL sources are present in RTL folder under three flavors: rtl/async_fifo.v: a basic asynchronous dual-clock FIFO ...
Verification of Asynchronous FIFO using System Verilog As the designs gets complex, the probability of occurrence of bugs increases. This necessitated the introduction of the verification phase for verifying the functionality of the IC and to detect the bugs at an early stage. In this paper,... ...
Research and Design of Asynchronous FIFO Based on FPGA In this article, a design method of asynchronous FIFO memory based on FPGA is put forward. With FPGA as the core controller, we adopt Verilog HDL and top-d... B Liu,M Liu,G Yang,... - International Conference on Machine Tool Techn...
San Jose, CA Voted Best Paper 1st Place ABSTRACT An interesting technique for doing FIFO design is to perform asynchronous comparisons between the FIFO write and read pointers that are generated in clock domains that are asynchronous to each other. The asynchronous FIFO pointer comparison technique ...
The simulation testcases available useIcarus VerilogandSVUTtool to run the tests. The FIFO is fully functional and used in many successful projects. Usage RTL sources are present in RTL folder under three flavors: rtl/async_fifo.v: a basic asynchronous dual-clock FIFO ...