Subversion Repositories w11

-- $Id: s3_sram_dummy.vhd 426 2011-11-18 18:14:08Z mueller $

--

-- Copyright 2007-2010 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>

--

-- This program is free software; you may redistribute and/or modify it under

-- the terms of the GNU General Public License as published by the Free

-- Software Foundation, either version 2, or at your option any later version.

--

-- This program 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 General Public License

-- for complete details.

-- 

------------------------------------------------------------------------------

-- Module Name:    s3_sram_dummy - syn

-- Description:    s3board: SRAM protection dummy

--

-- Dependencies:   -

-- Test bench:     -

-- Target Devices: generic

-- Tool versions:  xst 8.1, 8.2, 9.1, 9.2, 11.4; ghdl 0.18-0.26

-- Revision History: 

-- Date         Rev Version  Comment

-- 2010-04-17   278   1.0.2  renamed from sram_dummy

-- 2007-12-09   101   1.0.1  use _N for active low

-- 2007-12-08   100   1.0    Initial version 

------------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

entity s3_sram_dummy is                 -- SRAM protection dummy

  port (

    O_MEM_CE_N : out slv2;              -- sram: chip enables  (act.low)

    O_MEM_BE_N : out slv4;              -- sram: byte enables  (act.low)

    O_MEM_WE_N : out slbit;             -- sram: write enable  (act.low)

    O_MEM_OE_N : out slbit;             -- sram: output enable (act.low)

    O_MEM_ADDR  : out slv18;            -- sram: address lines

    IO_MEM_DATA : inout slv32           -- sram: data lines

  );

end s3_sram_dummy;

architecture syn of s3_sram_dummy is

begin

  O_MEM_CE_N <= "11";                   -- disable sram chips

  O_MEM_BE_N <= "1111";

  O_MEM_WE_N <= '1';

  O_MEM_OE_N <= '1';

  O_MEM_ADDR  <= (others=>'0');

  IO_MEM_DATA <= (others=>'0');

end syn;