Verilog wire reg

Verilog is a hardware description language used to design digital circuits. In Verilog, wires and registers are two types of variables used to represent signals in a circuit.

A wire in Verilog represents a continuous signal, like a wire in a physical circuit. It is declared using the 'wire' keyword and can only be assigned a value through continuous assignments, such as a module output or a netlist connection.

Example:

wire [7:0] data_in; // 8-bit input wire

A register in Verilog represents a signal that can hold a value, like a flip-flop in a physical circuit. It is declared using the 'reg' keyword and can be assigned a value through procedural assignments, such as always blocks or initial blocks.

Example:

reg [7:0] data_out; // 8-bit output register

In summary, wires represent continuous signals and registers represent signals that can hold a value. Both wires and registers are important in designing digital circuits in Verilog.