Contents
Can inputs be registers in Verilog?
So, outputs can be either reg or wire, but an input cannot be a reg. So, in your example you could declare an internal – temporary variable as reg and an input signal as wire.
How do you represent register data in Verilog?
Register data types are used as variables in procedural blocks. They store logic values only (no logic strength). A register data type must be used when the signal is on the left-hand side of a procedural assignment. Verilog-2001 adds the ability to initialize variables at the time they are declared.
How do you declare numbers in Verilog?
Verilog Number Format. Integer numbers are specified as <sign>>. If the is not given, then the number of bits is a default minimum of 32.
How does the register file in Verilog work?
The module is clocked using the 1-bit input clock line clk. The module also has a 1-bit enable line, EN and a 1-bit active high reset line, rst . The Register File module also has two 4-bit output selection ports Sel_o1 and Sel_o2, and one 4-bit input selection port Sel_i1.
How to connect output to input in Verilog?
I want to connect B’s output to C’s input. module my_moduleA (inA, outA) input inA; output reg outA; //If you want to assign something to out inside an always block, it has to be output reg, otherwise you will have to use assign out from an always block.
When to use a net data type in Verilog?
A net data type must be used when a signal is: driven by the output of some devices. declared as an input or inout port. on the left-hand side of a continuous assignment statement. The keyword wire is the most commonly used net in modeling circuits.
When to use the read enable switch in Verilog?
Any value provided on output selection port ( 4-bit input Sel_o1) is used to select the content of the corresponding register to provide as output on the 32-bit output port Op1 on the positive edge of clock when the read enable switch is high.