module blinky (input wire CLK, output wire PIN_24);

    wire CLK_1;

    SB_PLL40_CORE usb_pll_inst (
        .REFERENCECLK(CLK),
        .PLLOUTCORE(CLK_1),
        .RESETB(1),
        .BYPASS(0)
    );

    // Fin=16, Fout=1;
    defparam usb_pll_inst.DIVF = 0; 
    defparam usb_pll_inst.DIVQ = 4;
    defparam usb_pll_inst.DIVR = 0; 
    defparam usb_pll_inst.FILTER_RANGE = 3'b001;
    defparam usb_pll_inst.FEEDBACK_PATH = "SIMPLE";
    defparam usb_pll_inst.DELAY_ADJUSTMENT_MODE_FEEDBACK = "FIXED";
    defparam usb_pll_inst.FDA_FEEDBACK = 4'b0000;
    defparam usb_pll_inst.DELAY_ADJUSTMENT_MODE_RELATIVE = "FIXED";
    defparam usb_pll_inst.FDA_RELATIVE = 4'b0000;
    defparam usb_pll_inst.SHIFTREG_DIV_MODE = 2'b00;
    defparam usb_pll_inst.PLLOUT_SELECT = "GENCLK";
    defparam usb_pll_inst.ENABLE_ICEGATE = 1'b0;

    localparam N=20;
    reg [N:0] counter=0;

    always @(posedge CLK_1) 
        counter <= counter+1;

    assign PIN_24=counter[N];

endmodule