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   1 -- J.STELZNER
   2 -- INFORMATIK-3 LABOR
   3 -- 23.08.2006
   4 -- File: PARITY_4.VHD
   5
   6 library ieee;
   7 use ieee.std_logic_1164.all;
   8
   9 entity PARITY_4 is
  10         port
  11         (
  12                 PAR_IN :in std_logic_vector(3 downto 0);
  13                 PAR_OUT :out std_logic
  14         );
  15 end entity PARITY_4;
  16
  17 architecture PARITY_4_DESIGN of PARITY_4 is
  18
  19 begin
  20
  21         PAR_OUT <= PAR_IN(3) xor PAR_IN(2) xor PAR_IN(1) xor PAR_IN(0);
  22
  23 end architecture PARITY_4_DESIGN;