在使用Verilog构建模型时除了可以使用Verilog提供的大量内置基本门之外,用户还可以使用大量的自定义有用户特点的原语,即自定义原语(UDP:User Defined Primitive)这些原语的结构和使用方法与基本门类似。在构建原语时需要注意,UDP只能有一个输出端口,可以有一个或者多个输入,其中可以使用的状态只有三种“0,1,x”,如果输入...
Verilog UDP(User Defined Primitives) User Defined Primitives 这是一篇很浅显易懂的介绍Verilog UDP的文章,翻译过来留存,原文可参考这里。 l介绍 Verilog有内建原语如门,传输管,开关等,这些都是相当小的原语,如果我们需要更为复杂的原语,verilog提供了UDP,也就是用户定义原语(User Defined Primitives). 使用UDP可以...
Verilog provides a set of 26 gate level primitives for modeling the actual logic implementation of a digital system. From these primitives, presented in Chapter 4, larger structural models may be hierarchically described. This chapter presents an advanced method for extending the set of gate level ...
Although the aim of this book is to teach behavioral modeling in Verilog, the book would not be complete without mentioning user-defined primitives (UDPs). A UDP describes a piece of logic with a truth table. UDPs can be either combinatorial or sequential. As you may recall, the Verilog ...
This page contains Verilog tutorial, Verilog Syntax, Verilog Quick Reference, PLI, modelling memory and FSM, Writing Testbenches in Verilog, Lot of Verilog Examples and Verilog in One Day Tutorial.
This page contains Verilog tutorial, Verilog Syntax, Verilog Quick Reference, PLI, modelling memory and FSM, Writing Testbenches in Verilog, Lot of Verilog Examples and Verilog in One Day Tutorial.
This includes the case analysis defined on clock buffers that result in the output clock of the buffer to be impacted by the case analysis. Start with the clock definitions. The clocks must be created before they can be used by any subsequent constraints. Any reference to a clock before it...
Using the Netlist Window The Netlist window (shown in the following figure) provides a hierarchical view of the elaborated or synthesized logic design including the nets, logic primitives, and hierarchical modules of the design, starting with the currently defined top module. To open the Netlist ...
User-defined primitives (UDPs) 翻译过来就是用户自定义原语,常常用于构建组合逻辑模型和时序逻辑模型。 我们编写Verilo代码时,定义寄存器使用的是reg 和always@(*clk*),运行VCS RTL仿真时,VCS能够识别此类信号是寄存器,能够模拟其行为模型。 然而在使用VCS进行网表仿真时,此时网表中寄存器名称是这样的SDFF*_XXXX,其...
The optional step phys_opt_design is enabled in the script through the property STEPS.PHYS_OPT_DESIGN.IS_ENABLED. Unlike with the non-project flow which allows dynamically calling the implementation commands based on conditions defined by the user, the run of a project flow must be configured ...