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[/] [ddr2_sdram/] [trunk/] [ipcore_dir/] [DDR2_Ram_Core/] [user_design/] [rtl/] [DDR2_Ram_Core_infrastructure_iobs_0.vhd] - Rev 2
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--***************************************************************************** -- DISCLAIMER OF LIABILITY -- -- This file contains proprietary and confidential information of -- Xilinx, Inc. ("Xilinx"), that is distributed under a license -- from Xilinx, and may be used, copied and/or disclosed only -- pursuant to the terms of a valid license agreement with Xilinx. -- -- XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION -- ("MATERIALS") "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER -- EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING WITHOUT -- LIMITATION, ANY WARRANTY WITH RESPECT TO NONINFRINGEMENT, -- MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. Xilinx -- does not warrant that functions included in the Materials will -- meet the requirements of Licensee, or that the operation of the -- Materials will be uninterrupted or error-free, or that defects -- in the Materials will be corrected. Furthermore, Xilinx does -- not warrant or make any representations regarding use, or the -- results of the use, of the Materials in terms of correctness, -- accuracy, reliability or otherwise. -- -- Xilinx products are not designed or intended to be fail-safe, -- or for use in any application requiring fail-safe performance, -- such as life-support or safety devices or systems, Class III -- medical devices, nuclear facilities, applications related to -- the deployment of airbags, or any other applications that could -- lead to death, personal injury or severe property or -- environmental damage (individually and collectively, "critical -- applications"). Customer assumes the sole risk and liability -- of any use of Xilinx products in critical applications, -- subject only to applicable laws and regulations governing -- limitations on product liability. -- -- Copyright 2005, 2006, 2007 Xilinx, Inc. -- All rights reserved. -- -- This disclaimer and copyright notice must be retained as part -- of this file at all times. --***************************************************************************** -- ____ ____ -- / /\/ / -- /___/ \ / Vendor : Xilinx -- \ \ \/ Version : 3.6.1 -- \ \ Application : MIG -- / / Filename : DDR2_Ram_Core_infrastructure_iobs_0.vhd -- /___/ /\ Date Last Modified : $Date: 2010/11/26 18:25:42 $ -- \ \ / \ Date Created : Mon May 2 2005 -- \___\/\___\ -- Device : Spartan-3/3A/3A-DSP -- Design Name : DDR2 SDRAM -- Purpose : This module has the FDDRRSE instantiations to the clocks. --***************************************************************************** library ieee; library UNISIM; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; use UNISIM.VCOMPONENTS.all; use work.DDR2_Ram_Core_parameters_0.all; entity DDR2_Ram_Core_infrastructure_iobs_0 is port( ddr2_ck : out std_logic_vector((CLK_WIDTH-1) downto 0); ddr2_ck_n : out std_logic_vector((CLK_WIDTH-1) downto 0); clk0 : in std_logic ); end DDR2_Ram_Core_infrastructure_iobs_0; architecture arc of DDR2_Ram_Core_infrastructure_iobs_0 is signal ddr2_clk_q : std_logic; signal vcc : std_logic; signal gnd : std_logic; signal clk180 : std_logic; ---- ************************************************** ---- iob attributes for instantiated FDDRRSE components ---- ************************************************** begin gnd <= '0'; vcc <= '1'; clk180 <= not clk0; --- *********************************** ---- This includes instantiation of the output DDR flip flop ---- for ddr clk's and dimm clk's ---- *********************************************************** U_clk_i : FDDRRSE port map ( Q => ddr2_clk_q, C0 => clk0, C1 => clk180, CE => vcc, D0 => vcc, D1 => gnd, R => gnd, S => gnd ); ---- ****************************************** ---- Ouput BUffers for ddr clk's and dimm clk's ---- ****************************************** r_inst : OBUFDS port map ( I => ddr2_clk_q, O => ddr2_ck(0), OB => ddr2_ck_n(0) ); end arc;