                        Core Name: Xilinx LogiCORE FIFO Generator
                        Version: 9.1
                        Release: ISE 14.1 / Vivado 2012.1
                        Release Date: April 24, 2012

    ================================================================================

    This document contains the following sections:

    1. Introduction
    2. New Features
      2.1 ISE
      2.2 Vivado
    3. Supported Devices
      3.1 ISE
      3.2 Vivado
    4. Resolved Issues
      4.1 ISE
      4.2 Vivado
    5. Known Issues
      5.1 ISE
      5.2 Vivado
    6. Technical Support
    7. Core Release History
    8. Legal Disclaimer

    ================================================================================

    1. INTRODUCTION

    For installation instructions for this release, please go to:

       www.xilinx.com/ipcenter/coregen/ip_update_install_instructions.htm

    For system requirements:

       www.xilinx.com/ipcenter/coregen/ip_update_system_requirements.htm

    This file contains release notes for the Xilinx LogiCORE IP FIFO Generator v9.1
    solution. For the latest core updates, see the product page at:

       www.xilinx.com/products/ipcenter/FIFO_Generator.htm

    ................................................................................

    2. NEW FEATURES

      2.1 ISE

        - ISE 14.1 software support
        - Defense Grade Virtex-7Q, Kintex-7Q, Artix-7Q and Zynq-Q, Defense Grade Lower Power Kintex-7QL and Artix-7QL,
          and Automotive Zynq device support
        - Data width support up to 4096 for AXI FIFO
        - Support of programmable Full/Empty flags as sideband signals for AXI FIFO

      2.2 Vivado

        - 2012.1 software support
        - Defense Grade Virtex-7Q, Kintex-7Q, Artix-7Q and Zynq-Q, Defense Grade Lower Power Kintex-7QL and Artix-7QL,
          and Automotive Zynq device support
        - Data width support up to 4096 for AXI FIFO
        - Support of programmable Full/Empty flags as sideband signals for AXI FIFO

    ................................................................................

    3. SUPPORTED DEVICES

      3.1 ISE

        The following device families are supported by the core for this release.

        All 7 Series devices
        Zynq-7000 devices
        All Virtex-6 devices
        All Spartan-6 devices
        All Virtex-5 devices
        All Spartan-3 devices
        All Virtex-4 devices

      3.2 Vivado

        All 7 Series devices
        Zynq-7000 devices

    ................................................................................

    4. RESOLVED ISSUES

      4.1 ISE

        - N/A

      4.2 Vivado

        - N/A

    ................................................................................

    5. KNOWN ISSUES

      5.1 ISE

        The following are known issues for v9.1 of this core at time of release:

        1. Importing an XCO file alters the XCO configurations

           Description: In the FIFO Generator GUI, after importing an XCO file (Independent clock, distributed memory configuration)
           into a Virtex-4 CORE Generator project, if the FIFO type is changed to "Independent Clocks, Built-in FIFO" in page 1,
           page 2 does not correctly offer the Read Clock Frequency and Write Clock Frequency options as it should.

           CR 467240
           AR 31379

        2. Status flags after the first write to Common Clock Built-in FIFO not guaranteed

           Description: When using Common Clock Built-in FIFO configuration with asynchronous reset for Virtex-6 FPGA,
           correct behavior of the FIFO status flags cannot be guaranteed after the first write.

           Workaround: To work around this issue, synchronize the negative edge of reset to RDCLK/WRCLK.
           For more information and additional workaround see Answer Record 41099.

      5.2 Vivado

        - N/A

    The most recent information, including known issues, workarounds, and
    resolutions for this version is provided in the IP Release Notes User Guide
    located at

       www.xilinx.com/support/documentation/user_guides/xtp025.pdf

    6. TECHNICAL SUPPORT

    To obtain technical support, create a WebCase at www.xilinx.com/support.
    Questions are routed to a team with expertise using this product.

    Xilinx provides technical support for use of this product when used
    according to the guidelines described in the core documentation, and
    cannot guarantee timing, functionality, or support of this product for
    designs that do not follow specified guidelines.

    7. CORE RELEASE HISTORY

    Date        By            Version      Description
    ================================================================================
    04/24/2012  Xilinx, Inc.  9.1          ISE 14.1 and Vivado 2012.1 support; Defense Grade 7 Series and Zynq devices, and Automotive Zynq device support
                                           AXI FIFO data width support up to 4096; Programmable Full/Empty as sideband signals for AXI FIFO
    01/18/2012  Xilinx, Inc.  8.4          ISE 13.4 support and Packet FIFO feature addition; Artix-7 Lower Power and Automotive Artix-7 device support
    10/19/2011  Xilinx, Inc.  8.3          ISE 13.3 support and QVirtex-6L device support
    06/22/2011  Xilinx, Inc.  8.2          ISE 13.2 support and Kintex-7L, Virtex-7L, Artix-7 and Zynq-7000 device support
    03/01/2011  Xilinx, Inc.  8.1          ISE 13.1 support and Virtex-7 and Kintex-7 device support; Wiring Logic and Register Slice Support
    10/29/2010  Xilinx, Inc.  7.3          ISE 13.0.2 support
    09/21/2010  Xilinx, Inc.  7.2          ISE 12.3 support; AXI4 Support
    07/30/2010  Xilinx, Inc.  7.1          ISE 13.0.1 support
    06/18/2010  Xilinx, Inc.  6.2          ISE 12.2 support
    04/19/2010  Xilinx, Inc.  6.1          ISE 12.1 support
    12/02/2009  Xilinx, Inc.  5.3 rev 1    ISE 11.4 support; Spartan-6 Low Power and Automotive Spartan-6 Device support
    09/16/2009  Xilinx, Inc.  5.3          Update to add 11.3; Virtex-6 Low Power and Virtex-6 HXT Device support
    06/24/2009  Xilinx, Inc.  5.2          Update to add 11.2 and Virtex-6 CXT device support
    04/24/2009  Xilinx, Inc.  5.1          Update to add 11.1 and Virtex-6 and Spartan-6 device support
    09/19/2008  Xilinx, Inc.  4.4          Update to add 10.1 SP3 and Virtex-5 TXT device support and miscellaneous bug fixes
    03/24/2008  Xilinx, Inc.  4.3          Update to add 10.1 support and miscellaneous bug fixes
    10/03/2007  Xilinx, Inc.  4.2          Support for FWFT for Block RAM and Distributed RAM Common Clock FIFOs
    08/08/2007  Xilinx, Inc.  4.1          Update to add 9.2i support; Revised to v4.1; ECC support for block RAM FIFO
    04/02/2007  Xilinx, Inc.  3.3          Update to add 9.1i support; Revised to v3.3; Spartan-3A and Spartan-3A DSP support; ECC support
    09/21/2006  Xilinx, Inc.  3.2          Revised to v3.2; Spartan-3 and Virtex-4 automotive device support
    07/13/2006  Xilinx, Inc.  3.1          Update to add 8.2i support; Revised to v3.1; Virtex-5 support
    01/11/2006  Xilinx, Inc.  2.3          Update to add 8.1i support; Revised to v2.3
    08/31/2005  Xilinx, Inc.  2.2          Update to add 7.1i SP4 support; Revised to v2.2
    04/28/2005  Xilinx, Inc.  2.1          Update to add 7.1i SP1 support; Revised to v2.1
    11/04/2004  Xilinx, Inc.  2.0          Update to add 6.3i support; Revised to v2.0
    05/21/2004  Xilinx, Inc.  1.1          Revised to v1.1; Virtex-4 support
    04/23/2004  Xilinx, Inc.  1.0          Update to add 6.2i support; First release
    ================================================================================

    ................................................................................

    8. LEGAL DISCLAIMER

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