clockgen.vhd

-- file: clockgen.vhd
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------------------------------------------------------------------------------
-- User entered comments
------------------------------------------------------------------------------
-- None
--
------------------------------------------------------------------------------
-- "Output    Output      Phase     Duty      Pk-to-Pk        Phase"
-- "Clock    Freq (MHz) (degrees) Cycle (%) Jitter (ps)  Error (ps)"
------------------------------------------------------------------------------
-- CLK_OUT1___108.000______0.000______50.0______385.185____150.000
--
------------------------------------------------------------------------------
-- "Input Clock   Freq (MHz)    Input Jitter (UI)"
------------------------------------------------------------------------------
-- __primary_________100.000____________0.010

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;
use ieee.numeric_std.all;

library unisim;
use unisim.vcomponents.all;

entity clockgen is
port
 (-- Clock in ports
  clk_in           : in     std_logic;
  -- Clock out ports
  clk_out          : out    std_logic
 );
end clockgen;

architecture xilinx of clockgen is
  attribute CORE_GENERATION_INFO : string;
  attribute CORE_GENERATION_INFO of xilinx : architecture is "clockgen,clk_wiz_v3_3,{component_name=clockgen,use_phase_alignment=true,use_min_o_jitter=false,use_max_i_jitter=false,use_dyn_phase_shift=false,use_inclk_switchover=false,use_dyn_reconfig=false,feedback_source=FDBK_AUTO,primtype_sel=DCM_SP,num_out_clk=1,clkin1_period=10.0,clkin2_period=10.0,use_power_down=false,use_reset=false,use_locked=false,use_inclk_stopped=false,use_status=false,use_freeze=false,use_clk_valid=false,feedback_type=SINGLE,clock_mgr_type=AUTO,manual_override=false}";
	  -- Input clock buffering / unused connectors
  signal clkin1            : std_logic;
  -- Output clock buffering
  signal clkfb             : std_logic;
  signal clk0              : std_logic;
  signal clkfx             : std_logic;
  signal clkfbout          : std_logic;
  signal locked_internal   : std_logic;
  signal status_internal   : std_logic_vector(7 downto 0);
begin


  -- Input buffering
  --------------------------------------
  clkin1_buf : IBUFG
  port map
   (O => clkin1,
    I => clk_in);


  -- Clocking primitive
  --------------------------------------
  
  -- Instantiation of the DCM primitive
  --    * Unused inputs are tied off
  --    * Unused outputs are labeled unused
  dcm_sp_inst: DCM_SP
  generic map
   (CLKDV_DIVIDE          => 2.000,
    CLKFX_DIVIDE          => 25,
    CLKFX_MULTIPLY        => 27,
    CLKIN_DIVIDE_BY_2     => FALSE,
    CLKIN_PERIOD          => 10.0,
    CLKOUT_PHASE_SHIFT    => "NONE",
    CLK_FEEDBACK          => "1X",
    DESKEW_ADJUST         => "SYSTEM_SYNCHRONOUS",
    PHASE_SHIFT           => 0,
    STARTUP_WAIT          => FALSE)
  port map
   -- Input clock
   (CLKIN                 => clkin1,
    CLKFB                 => clkfb,
    -- Output clocks
    CLK0                  => clk0,
    CLK90                 => open,
    CLK180                => open,
    CLK270                => open,
    CLK2X                 => open,
    CLK2X180              => open,
    CLKFX                 => clkfx,
    CLKFX180              => open,
    CLKDV                 => open,
   -- Ports for dynamic phase shift
    PSCLK                 => '0',
    PSEN                  => '0',
    PSINCDEC              => '0',
    PSDONE                => open,
   -- Other control and status signals
    LOCKED                => locked_internal,
    STATUS                => status_internal,
    RST                   => '0',
   -- Unused pin, tie low
    DSSEN                 => '0');




  -- Output buffering
  -------------------------------------
  clkf_buf : BUFG
  port map
   (O => clkfb,
    I => clk0);


  clkout1_buf : BUFG
  port map
   (O   => clk_out,
    I   => clkfx);



end xilinx;