axi_hp_clk.v 3.05 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/*!
 * <b>Module:</b>axi_hp_clk
 * @file axi_hp_clk.v
 * @date 2015-04-27  
 * @author Andrey Filippov     
 *
 * @brief Generate global clock for axi_hp
 *
 * @copyright Copyright (c) 2015 Elphel, Inc.
 *
 * <b>License:</b>
12 13 14 15 16 17 18 19 20 21 22 23 24
 *
 * axi_hp_clk.v is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 *  axi_hp_clk.v is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/> .
25 26 27 28 29 30
 *
 * Additional permission under GNU GPL version 3 section 7:
 * If you modify this Program, or any covered work, by linking or combining it
 * with independent modules provided by the FPGA vendor only (this permission
 * does not extend to any 3-rd party modules, "soft cores" or macros) under
 * different license terms solely for the purpose of generating binary "bitstream"
31
 * files and/or simulating the code, the copyright holders of this Program give
32 33
 * you the right to distribute the covered work without those independent modules
 * as long as the source code for them is available from the FPGA vendor free of
Andrey Filippov's avatar
Andrey Filippov committed
34
 * charge, and there is no dependence on any encrypted modules for simulating of
35 36 37
 * the combined code. This permission applies to you if the distributed code
 * contains all the components and scripts required to completely simulate it
 * with at least one of the Free Software programs.
38
 */
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
`timescale 1ns/1ps

module  axi_hp_clk#(
    parameter CLKIN_PERIOD =        20, //ns >1.25, 600<Fvco<1200
    parameter CLKFBOUT_MULT_AXIHP = 18, // Fvco=Fclkin*CLKFBOUT_MULT_F/DIVCLK_DIVIDE, Fout=Fvco/CLKOUT#_DIVIDE
    parameter CLKFBOUT_DIV_AXIHP =  6   // To get 150MHz for the reference clock
    )(
    input   rst,
    input   clk_in,
    output  clk_axihp,
    output  locked_axihp
);
    wire  clkfb_axihp, clk_axihp_pre; 
    BUFG clk_axihp_i (.O(clk_axihp), .I(clk_axihp_pre));
    pll_base #(
        .CLKIN_PERIOD(CLKIN_PERIOD), // 20
        .BANDWIDTH("OPTIMIZED"),
        .CLKFBOUT_MULT(CLKFBOUT_MULT_AXIHP), // 18, // Fvco=Fclkin*CLKFBOUT_MULT_F/DIVCLK_DIVIDE, Fout=Fvco/CLKOUT#_DIVIDE
        .CLKOUT0_DIVIDE(CLKFBOUT_DIV_AXIHP), // 6, // To get 300MHz for the reference clock
        .REF_JITTER1(0.010),
        .STARTUP_WAIT("FALSE")
    ) pll_base_i (
        .clkin(clk_in), // input
        .clkfbin(clkfb_axihp), // input
//        .rst(rst), // input
        .rst(rst), // input
        .pwrdwn(1'b0), // input
        .clkout0(clk_axihp_pre), // output
        .clkout1(), // output
        .clkout2(), // output
        .clkout3(), // output
        .clkout4(), // output
        .clkout5(), // output
        .clkfbout(clkfb_axihp), // output
        .locked(locked_axihp) // output
    );


endmodule