Next comes the instantiation part for gates. But in the gate- level, we only declare the intermediate variables as wire there’s no need for reg or wire declaration for input-output entities. You might have noticed that other modeling styles include the declaration of variables along-with their respective data- types. ![]() Next comes the declaration of input, output, and intermediate signals. Note that we don’t declare intermediate signals while defining the module. Y is the output and D0, D1 and S being input are written after. The order of mentioning output and input variables is crucial here, the output variable is written first in the bracket, then the input ones. ![]() Verilog code for 2:1 MUX using gate-level modelingįor the gate level, we will first declare the module for 2: 1 MUX, followed by the input-output signals.
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