Subversion Repositories t48

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--

-- A synchronous parametrizable ROM instantiating a standard ROM from

-- the Altera LPM.

--

-- $Id: syn_rom-lpm-a.vhd,v 1.1 2004-03-24 21:32:27 arniml Exp $

--

-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)

--

-- All rights reserved

--

-- Redistribution and use in source and synthezised forms, with or without

-- modification, are permitted provided that the following conditions are met:

--

-- Redistributions of source code must retain the above copyright notice,

-- this list of conditions and the following disclaimer.

--

-- Redistributions in synthesized form must reproduce the above copyright

-- notice, this list of conditions and the following disclaimer in the

-- documentation and/or other materials provided with the distribution.

--

-- Neither the name of the author nor the names of other contributors may

-- be used to endorse or promote products derived from this software without

-- specific prior written permission.

--

-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE

-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

-- POSSIBILITY OF SUCH DAMAGE.

--

-- Please report bugs to the author, but before you do so, please

-- make sure that this is not a derivative work and that

-- you have the latest version of this file.

--

-- The latest version of this file can be found at:

--      http://www.opencores.org/cvsweb.shtml/t48/

--

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library ieee;

use ieee.std_logic_1164.all;

architecture lpm of syn_rom is

  component lpm_rom

    generic (

      LPM_WIDTH           : positive;

      LPM_TYPE            : string    := "LPM_ROM";

      LPM_WIDTHAD         : positive;

      LPM_NUMWORDS        : natural   := 0;

      LPM_FILE            : string;

      LPM_ADDRESS_CONTROL : string    := "REGISTERED";

      LPM_OUTDATA         : string    := "REGISTERED";

      LPM_HINT            : string    := "UNUSED"

    );

    port (

      address             : in  std_logic_vector(LPM_WIDTHAD-1 downto 0);

      inclock             : in  std_logic;

      memenab             : in  std_logic;

      q                   : out std_logic_vector(LPM_WIDTH-1 downto 0)

    );

  end component;

  signal one_s : std_logic;

begin

  one_s <= '1';

  rom_b : lpm_rom

    generic map (

      LPM_WIDTH           => 8,

      LPM_TYPE            => "LPM_ROM",

      LPM_WIDTHAD         => address_width_g,

      LPM_NUMWORDS        => 2 ** address_width_g,

      LPM_FILE            => "t48_rom.hex",

      LPM_ADDRESS_CONTROL => "REGISTERED",

      LPM_OUTDATA         => "UNREGISTERED",

      LPM_HINT            => "UNUSED"

    )

    port map (

      address  => rom_addr_i,

      inclock  => clk_i,

      memenab  => one_s,

      q        => rom_data_o

    );

end lpm;

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