What is wire data type?
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What is wire data type?
A wire is a Verilog data-type used to connect elements and to connect nets that are driven by a single gate or continuous assignment. The wire is similar to the electrical wire that is used to connect two components on a breadboard.
What is the difference between reg wire and logic?
1 Answer. There is absolutely no difference between reg and logic in SystemVerilog except for the way they are spelled – they are keyword synonyms. logic is meant to replace reg because reg was originally intended to be short for register. Also note that logic is a data type for a signal, whereas wire is a signal type.
What is Reg in VHDL?
Nets were intended as connections between hardware elements, and had values driven onto them; they didn’t hold those values. Nets are normally declared as wire . Registers were data storage elements, and did hold a value; they are normally declared as reg .
What is the default value of Reg and wire?
Default data type is wire: this means that if you declare a variable without specifying reg or wire, it will be a 1-bit wide wire. Now, coming to reg data type, reg can store value and drive strength. Something that we need to know about reg is that it can be used for modeling both combinational and sequential logic.
What does WIRE mean in Verilog?
wire elements are used to connect input and output ports of a module instantiation together with some other element in your design. 2. wire elements are used as inputs and outputs within an actual module declaration. 3. wire elements must be driven by something, and cannot store a value without being driven.
Why logic data type is used in SystemVerilog?
SystemVerilog introduces a new 4-state data type called logic that can be driven in both procedural blocks and continuous assign statements. But, a signal with more than one driver needs to be declared a net-type such as wire so that SystemVerilog can resolve the final value.