74x139 Using with – select statement in data flow model

74x139     Using with – select statement in data flow model

library IEEE;

use IEEE.std_logic_1164.all;

entity dec74x139 is

port ( G_L: in  STD_LOGIC;

                    A, B: in  STD_LOGIC;

                   Y0_L, Y1_L, Y2_L, Y3_L: out STD_LOGIC);

end dec74x139;

architecture arch3 of dec74x139 is

begin

          with G_L & A & B select

Y0_L <= ‘0’ when “000”,

               ‘1’ when others;

with G_L & A & B select

Y1_L <= ‘0’ when “001”,

              ‘1’ when others;

          with G_L & A & B select

Y2_L <= ‘0’ when “010”,

              ‘1’ when others;

          with G_L & A & B select

Y3_L <= ‘0’ when “011”,

              ‘1’ when others;

end arch3;