Verilog Programming part 25 ppt
Verilog Programming part 25 ppt
... module. Tasks are used for common Verilog code that contains delays, timing, event constructs, or multiple output arguments. Functions are used when common Verilog code is purely combinational, ... 8.1 Differences between Tasks and Functions Tasks and functions serve different purposes in Verilog. We discuss tasks and functions in greater detail in the following sections. However,...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 8 ppt
... connections. However, a warning is typically issued that the widths do not match. Unconnected ports Verilog allows ports to remain unconnected. For example, certain output ports might be simply for ... There are rules governing port connections when modules are instantiated within other modules. The Verilog simulator complains if any port connection rules are violated. These rules ar...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 1 ppt
... Team LiB ] 1.5 Popularity of Verilog HDL Verilog HDL has evolved as a standard hardware description language. Verilog HDL offers many useful features • Verilog HDL is a general-purpose ... easy to use. It is similar in syntax to the C programming language. Designers with C programming experience will find it easy to learn Verilog HDL. • Verilog HDL allows different lev...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 3 pptx
... reset); // Instantiate D_FF. Call it dff0. not n1(d, q); // not gate is a Verilog primitive. Explained later. endmodule In Verilog, it is illegal to nest modules. One module definition cannot ... module provides a template from which you can create actual objects. When a module is invoked, Verilog creates a unique object from the template. Each object has its own name, variables,...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 5 ppt
... Variable Vector Part Select Another ability provided in Verilog HDl is to have variable part selects of a vector. This allows part selects to be put in for loops to select various parts of the ... the part select can be varied, but the width has to be constant. The following example shows the use of variable vector part select: reg [255 :0] data1; //Little endian notation re...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 20 ppt
... four types of looping statements in Verilog: while, for, repeat, and forever. The syntax of these loops is very similar to the syntax of loops in the C programming language. All looping statements ... end 7.6.2 For Loop The keyword for is used to specify this loop. The for loop contains three parts: • An initial condition • A check to see if the terminating condition is true • A pro...
Ngày tải lên: 01/07/2014, 21:20
Verilog Programming part 21 ppt
... can be given names. • Local variables can be declared for the named block. • Named blocks are a part of the design hierarchy. Variables in a named block can be accessed by using hierarchical ... sequential block with delay in Example 7-26 and convert it to a p arallel block. The converted Verilog code is shown in Example 7-27. The result of simulation remains the same except that al...
Ngày tải lên: 01/07/2014, 21:20
Tài liệu Toefl cbt book part 25 ppt
... have worked through this practice test at least once by just listening to the CD. Part A Directions: In this part, you will hear short conversations between two people. After the con- versation, ... from the reading that beeswax is A. absorbent. B. pliable. C. complex in structure. D. sweet. 224 Part IV: Putting It All Together: Practice Tests For more material and information, please vi...
Ngày tải lên: 14/12/2013, 18:15