Web可以使用 set_clock_uncertainty 命令为时钟端口指定任何时钟不确定值。 以下列表显示了 set_clock_uncertainty 命令,包括可用选项: set_clock_uncertainty [-from WebMar 31, 2015 · 1. Activity points. 22. Setup uncertainty is used to specify the expected maximum variance in the clock tree under worst-case conditions. It is only specified prior to clock tree synthesis and back-annotation. (Once the clock tree is generated, the actual uncertainty can be calculated by the static analysis tool)
工作3.4-DC综合:clock uncertainty的设置 - 知乎
Web1、创建 Base clocks 基础时钟 约束. 基础时钟是输入fpga的主要时钟,基础时钟是由片外的晶振或者外部器件产生的,是整个设计的时钟源头,其余的generated clocks以及其它约束都是用base clocks作为参考时钟的。. 用create_clock 指令 对输入时钟进行约束,下面的7-8是 … WebMicrosemi Corporate Headquarters One Enterprise, Aliso Viejo, CA 92656 USA Within the USA: +1 (800) 713-4113 Outside the USA: +1 (949) 380-6100 doctor 4 u uk
what is clock latency and clock uncertainty - Forum for Electronics
WebThe set_clock_uncertainty command specifies clock uncertainty or skew for clocks or clock-to-clock transfers. You can specify the uncertainty separately for setup and hold, … WebSome calculation needs both the clock jitter or Clock Uncertainty. I don't find a definition of these two terms. Such as this: The equation for the setup analysis is the data path delay plus the synchronous element setup time minus the clock path skew. Setup Time = Data Path Delay \+ Synchronous Element Setup Time - Clock Path Skew Could you ... WebOct 18, 2013 · The command set_clock_uncertainty lets you specify these numbers. The analyzer subtracts the setup uncertainty from the data required time for each applicable path, and adds the hold uncertainty to the data required time for each applicable path. Let’s see an example. set_clock_uncertainty -setup 0.5 [get_clocks SCLK] … doctor \u0026 diva tv show