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[/] [xmatchpro/] [trunk/] [xmw4-comdec/] [src/] [decode4_16_inv.vhd] - Rev 9
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--This library is free software; you can redistribute it and/or --modify it under the terms of the GNU Lesser General Public --License as published by the Free Software Foundation; either --version 2.1 of the License, or (at your option) any later version. --This library is distributed in the hope that it will be useful, --but WITHOUT ANY WARRANTY; without even the implied warranty of --MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --Lesser General Public License for more details. --You should have received a copy of the GNU Lesser General Public --License along with this library; if not, write to the Free Software --Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA -- e_mail : j.l.nunez-yanez@byacom.co.uk ------------------------------------- -- ENTITY = DECODE4_16_INV -- -- version = 3.0 -- -- last update = 10/09/99 -- -- author = Jose Nunez -- ------------------------------------- -- FUNCTION -- 4 to 16 match location decoder (active high outputs) -- PIN LIST -- MATCH_LOC_IN = input match location (binary) -- MATCH_LOC_OUT = output match location (active high outputs) library ieee,dzx; use ieee.std_logic_1164.all; use dzx.bit_arith.all; use dzx.attributes.all; entity DECODE4_16_inv is port ( MATCH_LOC_IN : in bit_vector(3 downto 0) ; MATCH_LOC_OUT : out bit_vector(15 downto 0) ); end DECODE4_16_inv; architecture DEC1 of DECODE4_16_inv is begin DECODE : process(MATCH_LOC_IN) begin case MATCH_LOC_IN is when "0000" => MATCH_LOC_OUT <= x"0001"; when "0001" => MATCH_LOC_OUT <= x"0002"; when "0010" => MATCH_LOC_OUT <= x"0004"; when "0011" => MATCH_LOC_OUT <= x"0008"; when "0100" => MATCH_LOC_OUT <= x"0010"; when "0101" => MATCH_LOC_OUT <= x"0020"; when "0110" => MATCH_LOC_OUT <= x"0040"; when "0111" => MATCH_LOC_OUT <= x"0080"; when "1000" => MATCH_LOC_OUT <= x"0100"; when "1001" => MATCH_LOC_OUT <= x"0200"; when "1010" => MATCH_LOC_OUT <= x"0400"; when "1011" => MATCH_LOC_OUT <= x"0800"; when "1100" => MATCH_LOC_OUT <= x"1000"; when "1101" => MATCH_LOC_OUT <= x"2000"; when "1110" => MATCH_LOC_OUT <= x"4000"; when "1111" => MATCH_LOC_OUT <= x"8000"; end case; end process DECODE; end DEC1; -- end of architecture
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