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