What is input in Verilog?

What is input in Verilog?

In Verilog, all port declarations are implicitly declared as wire. If a port is intended to be a wire, it is sufficient to declare it as output, input, or inout. Input and inout ports are generally declared as wires.

What is a data type in Verilog?

Data types in Verilog are divided into NETS and Registers. These data types differ in the way that they are assigned and hold values and also they represent different hardware structures. The Verilog HDL value set consists of four basic values: Value. Definition.

How many data types are there in Verilog?

Integer and Real Data Types Verilog introduces new two-state data types, where each bit is 0 or 1 only. Using two-state variables in RTL models may enable simulators to be more efficient. And they are not affecting the synthesis results. Unlike in C, Verilog specifies the number of bits for the fixed-width types.

What are the input and output keywords in Verilog?

These keywords declare input, output and bidirectional ports of a module or task. Input and inout ports are of type wire. An output port can be configured to be of type wire, reg, wand, wor or tri.

What are the different data types in Verilog?

Data Types. Almost all Verilog data types store all these values: 0 (logic zero, or false condition) 1 (logic one, or true condition) x (unknown logic value) x and z have limited use for synthesis. z (high impedance state) Wire A wire represents a physical wire in a circuit and is used to connect gates or modules.

When do you use a Reg in Verilog?

A reg (register) is a data object that holds its value from one procedural assignment to the next. They are used only in functions and procedural blocks. See “Wire” on p. 4 above. A reg is a Verilog variable type and does not necessarily imply a physical register.

What is the value of Z in Verilog 1?

Z High impedance, floating X Unknown logic value 1 Logic one 0 Logic zero Value Meaning An X bit might be a 0, 1, Z, or in transition. We can set bits to be X in situations where we don’t care what the value is.