FPGA芯片时钟架构分析

Clock Architecture Analysis of FPGA Chip

FPGA设计中时钟信号的设计与处理是保证系统稳定工作的重要组成部分,随着FPGA器件规模的不断增大,集成度不断提高,多时钟域管理、时钟延迟、时钟信号完整性和相位偏移等已成为影响FPGA设计的关键因素。结合微电子电路相关知识,针对Xilinx公司的Virtex4系列芯片,详细分析其时钟架构及时钟资源的特性。针对FPGA时钟设计的典型应用情况,从芯片角度给出了时钟设计与使用的一些技巧和建议。

In the FPGA design, the design and processing of the clock signal is an important part of the stability of the system. With the increasing size and integration level of FPGA devices, multi-clock domain management, clock delay,clock signal integrity and phase offset have become the key factors affecting FPGA design. The article presents a detailed analysis of the clock architecture and resource characteristics of the Virtex4 series chip of Xilinx Company. By referring the typical application of FPGA clock design, some tips and suggestions on clock design and usages are given.