Parameters customize module instantiation

• Can “tweak” modules for particular applications

  • Example: Variable bit widths

module comparator (a, b, c);

parameter width = 8;

input [width-1:0] a, b;

output c;

assign c = (a == b);

endmodule

...

comparator #(32) c32(w, x, p);

...

comparator #(4) c4(y, z, q);

...

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