ddcm.vhd

千兆以太网控制器.可以调整FIFO,和传输速率,在码流层进行控制.

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-- Copyright (c) 1995-2006 Xilinx, Inc.  All rights reserved.
--------------------------------------------------------------------------------
--   ____  ____ 
--  /   /\/   / 
-- /___/  \  /    Vendor: Xilinx 
-- \   \   \/     Version : 8.2.02i
--  \   \         Application : xaw2vhdl
--  /   /         Filename : ddcm.vhd
-- /___/   /\     Timestamp : 10/24/2006 17:52:34
-- \   \  /  \ 
--  \___\/\___\ 
--
--Command: xaw2vhdl-intstyle C:/XC3S1500/gphy_vhdl/ddcm.xaw -st ddcm.vhd
--Design Name: ddcm
--Device: xc3s1500-4fg676
--
-- Module ddcm
-- Generated by Xilinx Architecture Wizard
-- Written for synthesis tool: XST

library ieee;
use ieee.std_logic_1164.ALL;
use ieee.numeric_std.ALL;
library UNISIM;
use UNISIM.Vcomponents.ALL;

entity ddcm is
   port ( CLKIN_IN        : in    std_logic; 
          RST_IN          : in    std_logic; 
          CLKIN_IBUFG_OUT : out   std_logic; 
          CLK0_OUT        : out   std_logic; 
          CLK90_OUT       : out   std_logic; 
          CLK180_OUT      : out   std_logic; 
          CLK270_OUT      : out   std_logic; 
          LOCKED_OUT      : out   std_logic);
end ddcm;

architecture BEHAVIORAL of ddcm is
   signal CLKFB_IN        : std_logic;
   signal CLKIN_IBUFG     : std_logic;
   signal CLK0_BUF        : std_logic;
   signal CLK90_BUF       : std_logic;
   signal CLK180_BUF      : std_logic;
   signal CLK270_BUF      : std_logic;
   signal GND1            : std_logic;
   component IBUFG
      port ( I : in    std_logic; 
             O : out   std_logic);
   end component;
   
   component BUFG
      port ( I : in    std_logic; 
             O : out   std_logic);
   end component;
   
   component DCM
      generic( CLK_FEEDBACK : string :=  "1X";
               CLKDV_DIVIDE : real :=  2.0;
               CLKFX_DIVIDE : integer :=  1;
               CLKFX_MULTIPLY : integer :=  4;
               CLKIN_DIVIDE_BY_2 : boolean :=  FALSE;
               CLKIN_PERIOD : real :=  10.0;
               CLKOUT_PHASE_SHIFT : string :=  "NONE";
               DESKEW_ADJUST : string :=  "SYSTEM_SYNCHRONOUS";
               DFS_FREQUENCY_MODE : string :=  "LOW";
               DLL_FREQUENCY_MODE : string :=  "LOW";
               DUTY_CYCLE_CORRECTION : boolean :=  TRUE;
               FACTORY_JF : bit_vector :=  x"C080";
               PHASE_SHIFT : integer :=  0;
               STARTUP_WAIT : boolean :=  FALSE;
               DSS_MODE : string :=  "NONE");
      port ( CLKIN    : in    std_logic; 
             CLKFB    : in    std_logic; 
             RST      : in    std_logic; 
             PSEN     : in    std_logic; 
             PSINCDEC : in    std_logic; 
             PSCLK    : in    std_logic; 
             DSSEN    : in    std_logic; 
             CLK0     : out   std_logic; 
             CLK90    : out   std_logic; 
             CLK180   : out   std_logic; 
             CLK270   : out   std_logic; 
             CLKDV    : out   std_logic; 
             CLK2X    : out   std_logic; 
             CLK2X180 : out   std_logic; 
             CLKFX    : out   std_logic; 
             CLKFX180 : out   std_logic; 
             STATUS   : out   std_logic_vector (7 downto 0); 
             LOCKED   : out   std_logic; 
             PSDONE   : out   std_logic);
   end component;
   
begin
   GND1 <= '0';
   CLKIN_IBUFG_OUT <= CLKIN_IBUFG;
   CLK0_OUT <= CLKFB_IN;
   CLKIN_IBUFG_INST : IBUFG
      port map (I=>CLKIN_IN,
                O=>CLKIN_IBUFG);
   
   CLK0_BUFG_INST : BUFG
      port map (I=>CLK0_BUF,
                O=>CLKFB_IN);
   
   CLK90_BUFG_INST : BUFG
      port map (I=>CLK90_BUF,
                O=>CLK90_OUT);
   
   CLK180_BUFG_INST : BUFG
      port map (I=>CLK180_BUF,
                O=>CLK180_OUT);
   
   CLK270_BUFG_INST : BUFG
      port map (I=>CLK270_BUF,
                O=>CLK270_OUT);
   
   DCM_INST : DCM
   generic map( CLK_FEEDBACK => "1X",
            CLKDV_DIVIDE => 2.0,
            CLKFX_DIVIDE => 1,
            CLKFX_MULTIPLY => 4,
            CLKIN_DIVIDE_BY_2 => FALSE,
            CLKIN_PERIOD => 8.0,
            CLKOUT_PHASE_SHIFT => "NONE",
            DESKEW_ADJUST => "SYSTEM_SYNCHRONOUS",
            DFS_FREQUENCY_MODE => "LOW",
            DLL_FREQUENCY_MODE => "LOW",
            DUTY_CYCLE_CORRECTION => TRUE,
            FACTORY_JF => x"C080",
            PHASE_SHIFT => 0,
            STARTUP_WAIT => FALSE)
      port map (CLKFB=>CLKFB_IN,
                CLKIN=>CLKIN_IBUFG,
                DSSEN=>GND1,
                PSCLK=>GND1,
                PSEN=>GND1,
                PSINCDEC=>GND1,
                RST=>RST_IN,
                CLKDV=>open,
                CLKFX=>open,
                CLKFX180=>open,
                CLK0=>CLK0_BUF,
                CLK2X=>open,
                CLK2X180=>open,
                CLK90=>CLK90_BUF,
                CLK180=>CLK180_BUF,
                CLK270=>CLK270_BUF,
                LOCKED=>LOCKED_OUT,
                PSDONE=>open,
                STATUS=>open);
   
end BEHAVIORAL;