zoukankan      html  css  js  c++  java
  • Clock Tree Sink Pins and Synchronous Pins

    http://hi.baidu.com/xinchao628/blog/item/07e7a088a063faa70f244417.html The clock tree sinks are the synchronous points of a clock tree.astro clock tree synthesis identifies the following pins as clock tree sinks. .sequential cells'clock port with trigger edge information .user-defined synchronous pins with tha ataDefineSyncPin or ataDefineSyncPort command if you are not sure whether the clock ports of sequential cells in your library have trigger edge information,review your library preparation or use the auDumpCLF command to write a text file.in the file,you must have defineTimingTLU statemates with the following keywords for all sequential cell, .setup_rising .setup_falling ,hold_rising .hold_falling .clock_rising .clock_falling note: if a sequential cell is defined as a clock-gating intergated cell with the dbSetLModeSubType command,or its output port has a create_generated_clock defined,its clock port is not treated as a clock sink(synchronous)pin,even if it has trgger edge information.astro clock tree synthesis traverses that pin and synthesize clock trees beyond that pin. if you want to synchronize a nonclock pin-such as a combination logic gate's pin,a macro's pin,or a sequential gate's set/reset pin --you must define it as a synvhronous pin explicitly ,using the dbDefineSyncPin or dbDefineSyncPort command,the dbDefineSyncPin command is used for the instance ,whereas ,the dbDefineSyncPort command is used for the master. review your library prepartion and design preparation to make sure your synchronous port and synchronous pin definitions are completed. 载中...
  • 相关阅读:
    java接口工厂模式理解
    ViewDragHelper的点击事件处理
    ViewDragHelper的使用
    路径跟踪 PathMeasure的简单使用
    view事件分发源码理解
    layoutInflater参数解析与源码分析
    安卓menu的介绍与使用
    安卓广播api介绍,给自己理清楚概念
    动态删除集合遇到的一些问题理解
    【翻译】借助 NeoCPU 在 CPU 上进行 CNN 模型推理优化
  • 原文地址:https://www.cnblogs.com/asic/p/2179668.html
Copyright © 2011-2022 走看看