FPGA时钟倍频分频DCM_IP CORE(源码及仿真图).docx

module tb_test;

// Inputs
reg CLK_IN1;
reg RESET;

// Outputs
wire CLK_OUT1;
wire LOCKED;

// Instantiate the Unit Under Test (UUT)
s6_clock uut (
.CLK_IN1(CLK_IN1),
.CLK_OUT1(CLK_OUT1),
.RESET(RESET),
.LOCKED(LOCKED)
);

initial begin
// Initialize Inputs

//RESET = 0;

// Wait 100 ns for global reset to finish
//#100;

CLK_IN1 = 0; // Add stimulus here
RESET = 1;
#60
RESET = 0;

forever begin
#20
CLK_IN1=!CLK_IN1 ;

end

end

endmodule

`timescale 1ps/1ps
(// Clock in ports
input CLK_IN1,
// Clock out ports
output CLK_OUT1,
// Status and control signals
input RESET,
output LOCKED
);

// Input buffering
//------------------------------------
IBUFG clkin1_buf
(.O (clkin1),
.I (CLK_IN1));

// Clocking primitive
//------------------------------------
// Instantiation of the DCM primitive
// * Unused inputs are tied off
// * Unused outputs are labeled unused
wire psdone_unused;
wire locked_int;
wire [7:0] status_int;
wire clkfb;
wire clk2x;

DCM_SP
#(.CLKDV_DIVIDE (2.000),
.CLKFX_DIVIDE (1),
.CLKFX_MULTIPLY (4),
.CLKIN_DIVIDE_BY_2 ("FALSE"),
.CLKIN_PERIOD (20.0),
.CLKOUT_PHASE_SHIFT ("NONE"),
.CLK_FEEDBACK ("2X"),
.DESKEW_ADJUST ("SYSTEM_SYNCHRONOUS"),
.PHASE_SHIFT (0),
.STARTUP_WAIT ("FALSE"))
dcm_sp_inst
// Input clock
(.CLKIN (clkin1),
.CLKFB (clkfb),
// Output clocks
.CLK0 (),
.CLK90 (),
.CLK180 (),
.CLK270 (),
.CLK2X (clk2x),
.CLK2X180 (),
.CLKFX (),
.CLKFX180 (),
.CLKDV (),
// Ports for dynamic phase shift
.PSCLK (1'b0),
.PSEN (1'b0),
.PSINCDEC (1'b0),
.PSDONE (),
// Other control and status signals
.LOCKED (locked_int),
.STATUS (status_int),
.RST (RESET),
// Unused pin- tie low
.DSSEN (1'b0));

assign LOCKED = locked_int;

// Output buffering
//-----------------------------------
assign clkfb = CLK_OUT1;

BUFG clkout1_buf
(.O (CLK_OUT1),
.I (clk2x));

endmodule