274 lines
6.7 KiB
Verilog
274 lines
6.7 KiB
Verilog
// ***************************************************************************
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// ***************************************************************************
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// Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.
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//
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// Each core or library found in this collection may have its own licensing terms.
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// The user should keep this in in mind while exploring these cores.
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//
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// Redistribution and use in source and binary forms,
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// with or without modification of this file, are permitted under the terms of either
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// (at the option of the user):
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//
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// 1. The GNU General Public License version 2 as published by the
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// Free Software Foundation, which can be found in the top level directory, or at:
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// https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
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//
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// OR
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//
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// 2. An ADI specific BSD license as noted in the top level directory, or on-line at:
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// https://github.com/analogdevicesinc/hdl/blob/dev/LICENSE
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//
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// ***************************************************************************
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// ***************************************************************************
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`timescale 1ns/100ps
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module ad_lvds_in #(
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// parameters
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parameter SINGLE_ENDED = 0,
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parameter DEVICE_TYPE = 0,
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parameter IODELAY_ENABLE = 1,
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parameter IODELAY_CTRL = 0,
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parameter IODELAY_GROUP = "dev_if_delay_group") (
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// data interface
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input rx_clk,
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input rx_data_in_p,
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input rx_data_in_n,
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output rx_data_p,
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output rx_data_n,
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// delay-data interface
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input up_clk,
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input up_dld,
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input [ 4:0] up_dwdata,
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output [ 4:0] up_drdata,
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// delay-cntrl interface
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input delay_clk,
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input delay_rst,
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output delay_locked);
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// internal parameters
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localparam VIRTEX7 = 0;
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localparam VIRTEX6 = 1;
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localparam ULTRASCALE_PLUS = 2;
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localparam ULTRASCALE = 3;
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// internal signals
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wire rx_data_ibuf_s;
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wire rx_data_idelay_s;
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wire [ 8:0] up_drdata_s;
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// delay controller
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generate if (IODELAY_ENABLE == 1 && IODELAY_CTRL == 1) begin
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if ((DEVICE_TYPE == ULTRASCALE_PLUS) || (DEVICE_TYPE == ULTRASCALE)) begin
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IDELAYCTRL #(.SIM_DEVICE ("ULTRASCALE")) i_delay_ctrl (
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.RST (delay_rst),
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.REFCLK (delay_clk),
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.RDY (delay_locked));
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end
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if ((DEVICE_TYPE == VIRTEX7) || (DEVICE_TYPE == VIRTEX6)) begin
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IDELAYCTRL i_delay_ctrl (
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.RST (delay_rst),
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.REFCLK (delay_clk),
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.RDY (delay_locked));
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end
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end else begin
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assign delay_locked = 1'b1;
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end
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endgenerate
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// receive data interface, ibuf -> idelay -> iddr
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generate
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if (SINGLE_ENDED == 1) begin
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IBUF i_rx_data_ibuf (
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.I (rx_data_in_p),
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.O (rx_data_ibuf_s));
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end else begin
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IBUFDS i_rx_data_ibuf (
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.I (rx_data_in_p),
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.IB (rx_data_in_n),
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.O (rx_data_ibuf_s));
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end
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endgenerate
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// idelay
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generate if (IODELAY_ENABLE == 1) begin
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if (DEVICE_TYPE == VIRTEX6) begin
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IODELAYE1 #(
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.CINVCTRL_SEL ("FALSE"),
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.DELAY_SRC ("I"),
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.HIGH_PERFORMANCE_MODE ("TRUE"),
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.IDELAY_TYPE ("VAR_LOADABLE"),
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.IDELAY_VALUE (0),
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.ODELAY_TYPE ("FIXED"),
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.ODELAY_VALUE (0),
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.REFCLK_FREQUENCY (200.0),
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.SIGNAL_PATTERN ("DATA"))
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i_rx_data_idelay (
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.T (1'b1),
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.CE (1'b0),
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.INC (1'b0),
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.CLKIN (1'b0),
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.DATAIN (1'b0),
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.ODATAIN (1'b0),
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.CINVCTRL (1'b0),
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.C (up_clk),
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.IDATAIN (rx_data_ibuf_s),
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.DATAOUT (rx_data_idelay_s),
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.RST (up_dld),
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.CNTVALUEIN (up_dwdata),
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.CNTVALUEOUT (up_drdata));
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end
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if (DEVICE_TYPE == VIRTEX7) begin
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IDELAYE2 #(
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.CINVCTRL_SEL ("FALSE"),
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.DELAY_SRC ("IDATAIN"),
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.HIGH_PERFORMANCE_MODE ("FALSE"),
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.IDELAY_TYPE ("VAR_LOAD"),
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.IDELAY_VALUE (0),
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.REFCLK_FREQUENCY (200.0),
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.PIPE_SEL ("FALSE"),
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.SIGNAL_PATTERN ("DATA"))
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i_rx_data_idelay (
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.CE (1'b0),
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.INC (1'b0),
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.DATAIN (1'b0),
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.LDPIPEEN (1'b0),
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.CINVCTRL (1'b0),
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.REGRST (1'b0),
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.C (up_clk),
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.IDATAIN (rx_data_ibuf_s),
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.DATAOUT (rx_data_idelay_s),
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.LD (up_dld),
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.CNTVALUEIN (up_dwdata),
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.CNTVALUEOUT (up_drdata));
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end
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if (DEVICE_TYPE == ULTRASCALE) begin
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assign up_drdata = up_drdata_s[8:4];
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IDELAYE3 #(
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.SIM_DEVICE ("ULTRASCALE"),
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.DELAY_SRC ("IDATAIN"),
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.DELAY_TYPE ("VAR_LOAD"),
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.REFCLK_FREQUENCY (200.0),
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.DELAY_FORMAT ("COUNT"))
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i_rx_data_idelay (
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.CASC_RETURN (1'b0),
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.CASC_IN (1'b0),
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.CASC_OUT (),
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.CE (1'b0),
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.CLK (up_clk),
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.INC (1'b0),
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.LOAD (up_dld),
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.CNTVALUEIN ({up_dwdata, 4'd0}),
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.CNTVALUEOUT (up_drdata_s),
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.DATAIN (1'b0),
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.IDATAIN (rx_data_ibuf_s),
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.DATAOUT (rx_data_idelay_s),
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.RST (1'b0),
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.EN_VTC (~up_dld));
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end
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if (DEVICE_TYPE == ULTRASCALE_PLUS) begin
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assign up_drdata = up_drdata_s[8:4];
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(* IODELAY_GROUP = IODELAY_GROUP *)
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IDELAYE3 #(
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.SIM_DEVICE ("ULTRASCALE_PLUS_ES1"),
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.DELAY_SRC ("IDATAIN"),
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.DELAY_TYPE ("VAR_LOAD"),
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.REFCLK_FREQUENCY (200.0),
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.DELAY_FORMAT ("COUNT"))
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i_rx_data_idelay (
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.CASC_RETURN (1'b0),
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.CASC_IN (1'b0),
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.CASC_OUT (),
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.CE (1'b0),
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.CLK (up_clk),
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.INC (1'b0),
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.LOAD (up_dld),
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.CNTVALUEIN ({up_dwdata, 4'd0}),
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.CNTVALUEOUT (up_drdata_s),
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.DATAIN (1'b0),
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.IDATAIN (rx_data_ibuf_s),
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.DATAOUT (rx_data_idelay_s),
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.RST (1'b0),
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.EN_VTC (~up_dld));
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end
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end else begin
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assign rx_data_idelay_s = rx_data_ibuf_s;
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assign up_drdata = 'h00;
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end
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endgenerate
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// iddr
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generate
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if (DEVICE_TYPE == ULTRASCALE) begin
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IDDRE1 #(
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.DDR_CLK_EDGE ("SAME_EDGE"))
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i_rx_data_iddr (
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.R (1'b0),
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.C (rx_clk),
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.CB (~rx_clk),
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.D (rx_data_idelay_s),
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.Q1 (rx_data_p),
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.Q2 (rx_data_n));
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end
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endgenerate
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generate
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if (DEVICE_TYPE == ULTRASCALE_PLUS) begin
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IDDRE1 #(
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.DDR_CLK_EDGE ("SAME_EDGE"))
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i_rx_data_iddr (
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.R (1'b0),
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.C (rx_clk),
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.CB (~rx_clk),
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.D (rx_data_idelay_s),
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.Q1 (rx_data_p),
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.Q2 (rx_data_n));
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end
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endgenerate
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generate
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if ((DEVICE_TYPE == VIRTEX7) || (DEVICE_TYPE == VIRTEX6)) begin
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IDDR #(
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.DDR_CLK_EDGE ("SAME_EDGE"),
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.INIT_Q1 (1'b0),
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.INIT_Q2 (1'b0),
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.SRTYPE ("ASYNC"))
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i_rx_data_iddr (
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.CE (1'b1),
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.R (1'b0),
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.S (1'b0),
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.C (rx_clk),
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.D (rx_data_idelay_s),
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.Q1 (rx_data_p),
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.Q2 (rx_data_n));
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end
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endgenerate
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endmodule
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// ***************************************************************************
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// ***************************************************************************
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