norgate.vhd

vhdl 语言程序设计

Library IEEE;
USE IEEE.std_logic_1164.all;
USE IEEE.std_logic_unsigned.all;
USE IEEE.numeric_std.all;
USE IEEE.std_logic_arith.all;

Entity norgate is 
 generic (size: integer:=4);
 Port (in1: in std_logic_vector ( size-1 downto 0);
       in2: in std_logic_vector ( size-1 downto 0);
       q:   out std_logic_vector ( size-1 downto 0));
End norgate; 
   
 Architecture dataflow  of norgate is
     signal q1: std_logic_vector ( size-1 downto 0);
     Begin 
         q1<= in1 or in2;
         q<= not q1;
 End dataflow;