NOT Primitive
| Names | 
                         Output Description:  | 
                         Input Description:  | 
|---|---|---|
| NOT | OUT = inverse of input | IN1= 1 input | 
Note: In Verilog HDL, you must use the built-in not gate primitive to
            implement the NOT logic function. Go to Using a Verilog HDL Gate
            Primitive for more information.