2、一个模块有的子模块是生成的,不希望spyglass报有关于这些模块的错: 做一个ignore.prj文件,source一下 3、filelist.prj 4、 set_option ignorefile set_option stop stop命令:当你使用set_option stop {module_name}命令时,Spyglass将停止对指定模块的内部进行lint分析,但仍然会分析该模块的接口。这意味着模块...
标记PLL时钟生成模块为black boxes的方法是,在project file中设置如下命令: set_option stop 一旦你设置这些模块为black boxes: ●将时钟约束定义在这些模块的输出pin上 ●将输出时钟和输入定义为同一个时钟域,除非两者之间没有相位关系 如下面的列子所示: FIGURE 1. Defining Clock Outputs as in the Same Domain ...
4.1 将时钟生成模块指定为black box 对时钟生成模块(比如PLL)的内部执行SpyGlass CDC分析非常复杂,而且对整体SpyGlass CDC分析几乎没有价值。 将这些块标记为黑盒子,除非你有详细的SGDC约束来定义这些模块的时钟特性。 标记PLL时钟生成模块为black boxes的方法是,在project file中设置如下命令: set_option stop <blocks...
4.1 将时钟生成模块指定为black box 对时钟生成模块(比如PLL)的内部执行SpyGlass CDC分析非常复杂,而且对整体SpyGlass CDC分析几乎没有价值。 将这些块标记为黑盒子,除非你有详细的SGDC约束来定义这些模块的时钟特性。 标记PLL时钟生成模块为black boxes的方法是,在project file中设置如下命令: set_option stop <blocks...
set_option stop <blocks> 一旦你设置这些模块为black boxes: 将时钟约束定义在这些模块的输出pin上 将输出时钟和输入定义为同一个时钟域,除非两者之间没有相位关系 如下面的列子所示: FIGURE 1. Defining Clock Outputs as in the Same Domain 4.2 为设计指定时钟和复位 ...
prj中。 1.命令解释 1.1 以上的几类命令 1.1.1 set_option set_option stop {xxx}: xxx是 Synopsys SpyGlass CDC 学习 (一) . parameter: 可以在进行RTL分析之前设定某些参数, 对检查过程进行一些约束 CDC介绍 CDC(Clock Domain Crossing)的前端设计中最常见的问题, 在RTL中要恰当的处理每个...是各个step...
If the module is stopped (using –stop), and you know which black box input should be routed to the specific black box output reported as a clock, then set assume_path between the input and the specific output of the black box; or ii. Define the signal as a clock for CDC ...
Well‐accepted structure will not stop metastability if D changes when EN is high Many signals in the enable path may have multi‐flop sync, not all of them are designed to prevent metastability Only ...
To access details such as maps, graphs and statistics, you just need to wipe across the designer stopwatch displayed at the interface. In addition, you can plan for upcoming cycling expedition on the calendar as well as organize activities and routes while still using the app. ...
• '-stop' command line option used • 'assume_path' constraint specified This WarnAnalyzeBBox rule reports the following scenarios: • functional view is missing in the given .sglib files • definition is empty or masked completely by pragmas ...