WebApr 16, 2024 · interface是UVM验证过程中的一个重要的组件,主要起到连接测试用例与DUT的作用,具有简化代码,易于修改等特点。本文主要介绍interface中的modport和clocking的用法。modport和clocking都是interface组件中的块,主要用于对信号进行分组和同步采样。本主要总结了modport和clocking的基本用法,同时实战演示了 ... WebMay 10, 2024 · 采样时发生竞争(delta cycle的存在),会导致采样数据错误。为了避免在RTL仿真中发生信号竞争的问题,建议通过非阻塞赋值或者特定的信号延迟来解决同步问题。这里我们介绍使用clocking时钟块来决定信号的驱动和采样的方式。delta cycle的存在问题 在RTL仿真时,由于无法确定具体电路的延迟时间 ...
SystemVerilog Clocking Block - Verification Guide
WebQ5.简述在TB中使用interface和clocking blocking的好处 Interface 是一组接口,用于对信号进行一个封装,捆扎起来。 如果像 verilog 中对各个信号进行连接,每一层我们都需要对接口信号进行定义,若信号过多,很容易出现人为错误,而且后期的可重用性不高。 WebDriver中vif.pwdata比vif.drv_cb.pwdata晚1ns,因为clocking block drv_cb的output skew。 35ns 见 delta cycle分析。 45ns 略. 结论. interface中尽量使用clocking来sync采样和驱动 … tower of babel got questions
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WebHow to use a clocking block ? // To wait for posedge of clock @busIf.cb_clk; // To use clocking block signals busIf.cb_clk.enable = 1; As you can see, you don't have to wait for the posedge of clk, before you assign 1 to enable. This way, you are assured that enable will be driven 2ns after the next posedge clk. WebJul 12, 2024 · Related: 6 Ways Top CEOs Beat Procrastination Blocking time gets you started and maintains motivation. Getting started is often the hardest part of completing a … WebIEEE Std 1800-2024, Ch.14.3(Clocking block declaration) and Ch.14.4(Input and output skews): "Unless otherwise specified, the default input skew is 1step and the default output skew is 0. A step is a special time unit whose value is defined in 3.14.3. A 1step input skew allows input signals to sample their steady-state values in the time step ... power app to write to sharepoint list