WebH, @liuqyqio2 , 针对综合后的时序报告,对于同一个时钟域下的300ps 以下的hold time vioaltion 都可以暂时略过. (你目前就是这种情况) 一方面这个结果是基于软件对于布局布线的预估,另一方面软件在后续的implementation中有能力自动修复这样的问题. 对于不同时钟域 …
爲什麼會有建立時間 (Setup Time)和保持時間 (Hold Time)?
Web25 Aug 2024 · Setup time is the maximum of this feedback delay, hold time is the minimum. To keep things simple most logic designers try to set up the relative max/min delays for clock and data to ensure zero hold time, but this isn’t always the case. ... The hold time needed for most of the will be mentioned as 0 seconds. It doesn't mean the devices are ... Web4 Mar 2024 · In general: In SPI there is only one clock edge that matters to the receiver. In modes 0 and 3 it is the rising edge, in modes 1 and 2 it is the falling edge. The receiver requires the data that it is going to read to be valid for some short period immediately before the edge that matters (called the "setup time") and requires that it remains ... brew 下载加速
Setup and Hold Time: A Guide for STA - linkedin.com
Web10 Jun 2024 · 如果设计违反setup time或者hold time,则设计进入亚稳态。 因此,必须通过时序分析工具Synopsys PT找出并解决设计中的时序违例问题。 Setup Time& Hold Time. 触发器输入信号'd'在有效时钟边沿到达之前所需的保持稳定值的最短时间,称为setup time(建 … Web1 Nov 2024 · 如果設計違反setuptime或者hold time,則設計進入亞穩態。 因此,必須透過時序分析工具Synopsys PT找出並解決設計中的時序違規問題。 Setup Time& Hold Time. 觸發器輸入訊號‘d’在有效時鐘邊沿到達之前所需的保持穩定值的最短時間,稱為Setup Time。 Web1 Apr 2024 · 现在我们从DFF的构造上分析了setup和hold的原理,请大家思考这样一个问题:从上面的描述可以看出,library setup time和library hold time应该都是正值,但是它们是否有可能是负值?如果有可能,在什么情况下会为负呢? 3. setup和hold为负值浅析 county/municipal code new jersey