Note that the always statement always A) could be written as always *. In Verilog, begin embarks and end concludes any block which contains more than one statement in it. is a part of the syntax, used before the sensitivity list. It controls when the statements in the always block are to be evaluated. The sensitivity list includes all input signals used by the always block. (Y, A) is known as the sensitivity list or the trigger list. Using the always statement, a procedural statement in Verilog, we will run the program sequentially. Next up, since its behavioral modeling style, here comes the always statement. here signifies that the output is of 4 bits. module Demultiplexer_1_to_4_case (Y, A, din) The reg data object holds its value from one procedural assignment statement to the next and means it holds its value over simulation data cycles.Īnother style of declaration in the port list is to declare the port size and port direction after the module declaration. Hence, states that the port named as A is a vector with MSB = 1 and LSB = 0. If a port has multiple bits, then it is known as a vector. Taking into consideration the first line of the code, Demultiplexer_1_to_4_case is the identifier, the input is called port direction. the direction of a port as input, output or inout.
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January 2023
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