e_multiplexer.vhd

书籍以及一些资料 还有些源程序 这是vhde相当珍贵的教材

library ieee;
use ieee.std_logic_1164.all;

entity E_multiplexer is
port (u0 : in std_logic ;
      u1 : in std_logic ;
      u2 : in std_logic ;
      v0 : in std_logic ;
      v1 : in std_logic ;
      v2 : in std_logic ;
      w0 : in std_logic ;
      w1 : in std_logic ;
      w2 : in std_logic ;
      x0 : in std_logic ;
      x1 : in std_logic ;
      x2 : in std_logic ;
      y0 : in std_logic ;
      y1 : in std_logic ;
      y2 : in std_logic ;
      s0 : in std_logic ;
      s1 : in std_logic ;
      s2 : in std_logic ;
      m0 : buffer std_logic; 
      m1 : buffer std_logic;
      m2 : buffer std_logic
      );
end E_multiplexer;

ARCHITECTURE Behavior OF E_multiplexer IS

        
COMPONENT E_mux51 IS
port (u : in std_logic ;
      v : in std_logic ;
      w : in std_logic ;
      x : in std_logic ;
      y : in std_logic ;
      s0 : in std_logic ;
      s1 : in std_logic ;
      s2 : in std_logic ;
      m : buffer std_logic 
      );
END COMPONENT;

BEGIN
u5:E_mux51 PORT MAP(u0,v0,w0,x0,y0,s0,s1,s2,m0);
u6:E_mux51 PORT MAP(u1,v1,w1,x1,y1,s0,s1,s2,m1);
u7:E_mux51 PORT MAP(u2,v2,w2,x2,y2,s0,s1,s2,m2);



END Behavior;