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sdc

  • Vivado时序约束

    Synopsys' widely-used design constraints format, known as sdc, describes the "design intent" and surrounding constraints for synthesis, clocking, timing, power, test and environmental and operating conditions. sdc has been in use and evolving for more than 20 years, making it the most popular and proven format for describing design constraints. Essentially all synthesized designs use sdc and numerous EDA companies have translators that can read and process sdc.

    标签: Vivado 时序约束

    上传时间: 2018-07-13

    上传用户:yalsim

  • vivado集成开发环境时序约束介绍

    本文主要介绍如何在Wado设计套件中进行时序约束,原文出自 xilinx中文社区。1 Timing Constraints in Vivado-UCF to xdcVivado软件相比于sE的一大转变就是约束文件,5E软件支持的是UcF(User Constraints file,而 Vivado软件转换到了XDc(Xilinx Design Constraints)。XDC主要基于sdc(Synopsys Design Constraints)标准,另外集成了Xinx的一些约束标准可以说这一转变是xinx向业界标准的靠拢。Altera从 TimeQuest开始就一直使用sdc标准,这一改变,相信对于很多工程师来说是好事,两个平台之间的转换会更加容易些。首先看一下业界标准sdc的原文介绍:Synopsys widely-used design constraints format, known as sdc, describes the design intent"and surrounding constraints for synthesis, clocking, timing, power, test and environmental and operating conditions. sdc has been in use and evolving for more than 20 years, making it the most popular and proven format for describing design constraints. Essentially all synthesized designs use sdc and numerous EDa companies have translators that can read and process sdc

    标签: vivado

    上传时间: 2022-03-26

    上传用户:

  • vivado约束指导手册

    时序路径时序路径由设计中instance之间的连接决定。在数字设计中,时序路径由一对时序元作sequential elements)形成,这对时序元件由一个或二个不同的时钟控制。普通时序路径在任何设计中最普通的时序路径有以下4种:1输入端口到内部时序单元路径2从时序单元到时序单元之间的内部路径3从内部时序单元到输出端口之间的路径4输入端口到输出端口之间的路径输入端口到内部时序单元之间路径在从输入端口到内部时序单元之间的路径上传输的数据:通过管脚时钟送出器件经过一个称为输入延时的延时到达器件端口(sdc定义)在到达由目标时钟destination clock)锁定的时序单元之前须通过器件内部逻从时序单元到时序单元的内部路径在从时序单元到时序单元的内部路径上传输的数据:由时序单元发送到器件内部,而此时序单元由源时钟(source clock)驱动,在到达由日标时钟驱动的时宁单元之前,须经过一些内部逻辑内部时序单元到外部端口路径在从内部时序单元到外部端口路径上的数据:,由时序单元发送到器件内部,而此时序单元由源时钟(source clock)驱动,在到达外部端口之前,须经过一些内部逻辑,在经过一段称为输出廷时的额外延时之后被端口时钟捕获(sdc definition)

    标签: vivado

    上传时间: 2022-06-16

    上传用户: