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57 lines
2.0 KiB
VHDL
57 lines
2.0 KiB
VHDL
-- $Id: s3_sram_dummy.vhd 984 2018-01-02 20:56:27Z mueller $
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--
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-- Copyright 2007-2010 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 3, or (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful, but
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-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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-- for complete details.
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--
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------------------------------------------------------------------------------
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-- Module Name: s3_sram_dummy - syn
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-- Description: s3board: SRAM protection dummy
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--
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-- Dependencies: -
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-- Test bench: -
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-- Target Devices: generic
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-- Tool versions: xst 8.1-14.7; ghdl 0.18-0.31
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-- Revision History:
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-- Date Rev Version Comment
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-- 2010-04-17 278 1.0.2 renamed from sram_dummy
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-- 2007-12-09 101 1.0.1 use _N for active low
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-- 2007-12-08 100 1.0 Initial version
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------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use work.slvtypes.all;
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entity s3_sram_dummy is -- SRAM protection dummy
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port (
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O_MEM_CE_N : out slv2; -- sram: chip enables (act.low)
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O_MEM_BE_N : out slv4; -- sram: byte enables (act.low)
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O_MEM_WE_N : out slbit; -- sram: write enable (act.low)
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O_MEM_OE_N : out slbit; -- sram: output enable (act.low)
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O_MEM_ADDR : out slv18; -- sram: address lines
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IO_MEM_DATA : inout slv32 -- sram: data lines
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);
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end s3_sram_dummy;
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architecture syn of s3_sram_dummy is
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begin
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O_MEM_CE_N <= "11"; -- disable sram chips
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O_MEM_BE_N <= "1111";
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O_MEM_WE_N <= '1';
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O_MEM_OE_N <= '1';
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O_MEM_ADDR <= (others=>'0');
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IO_MEM_DATA <= (others=>'0');
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end syn;
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