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-- File Name    : mux01.vbe

-- Version      : v1.1

-- Description  : behavioral description of 1 bit multiplexer 4 to 1

-- Purpose      : to generate structural description of 1 bit multiplexer 4 to 1

-- Author       : Sigit Dewantoro

-- Address      : IS Laboratory, Labtek VIII, ITB, Jl. Ganesha 10, Bandung, Indonesia

-- Email        : sigit@students.ee.itb.ac.id, sigit@ic.vlsi.itb.ac.id

-- Date         : August 12th, 2001

entity mux01 is

port(

        a   : in bit;

        b   : in bit;

        c   : in bit;

        d   : in bit;

        sel : in bit_vector (1 downto 0);

        o   : out bit;

        vdd : in bit;

        vss : in bit

);

end mux01;

architecture vbe of mux01 is

begin

ASSERT ((vdd and not (vss)) = '1')

  REPORT "power supply is missing on mux01"

  SEVERITY WARNING;

  with sel select

  o <= a when "00",

       b when "01",

       c when "10",

       d when "11",

       '0' when others;

end vbe;