Avnet UCF Generator设计约束文件

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#  / \===\   \==/
# /___\===\___\/  AVNET Design Resource Center
#      \======/         www.em.avnet.com/drc
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#  Created With Avnet UCF Generator V0.4.0 
#     Date: Saturday, June 30, 2012 
#     Time: 12:18:55 AM 
# 
#  This design is the property of Avnet.  Publication of this
#  design is not authorized without written consent from Avnet.
#  
#  Please direct any questions to:
#     ZedBoard.org Community Forums
#     http://www.zedboard.org
# 
#  Disclaimer:
#     Avnet, Inc. makes no warranty for the use of this code or design.
#     This code is provided  "As Is". Avnet, Inc assumes no responsibility for
#     any errors, which may appear in this code, nor does it make a commitment
#     to update the information contained herein. Avnet, Inc specifically
#     disclaims any implied warranties of fitness for a particular purpose.
#                      Copyright(c) 2012 Avnet, Inc.
#                              All rights reserved.
# 

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#  Notes:
# 
#  10 August 2012
#     IO standards based upon Bank 34 and Bank 35 Vcco supply options of 1.8V, 
#     2.5V, or 3.3V are possible based upon the Vadj jumper (J18) settings.  
#     By default, Vadj is expected to be set to 1.8V but if a different 
#     voltage is used for a particular design, then the corresponding IO 
#     standard within this UCF should also be updated to reflect the actual 
#     Vadj jumper selection.
# 
#  09 September 2012
#     Net names are not allowed to contain hyphen characters '-' since this
#     is not a legal VHDL87 or Verilog character within an identifier.  
#     HDL net names are adjusted to contain no hyphen characters '-' but 
#     rather use underscore '_' characters.  Comment net name with the hyphen 
#     characters will remain in place since these are intended to match the 
#     schematic net names in order to better enable schematic search.
#
#  17 April 2014
#     Pin constraint for toggle switch SW7 was corrected to M15 location.
#
#  16 April 2015
#     Corrected the way that entire banks are assigned to a particular IO
#     standard so that it works with more recent versions of Vivado Design
#     Suite and moved the IO standard constraints to the end of the file 
#     along with some better organization and notes like we do with our SOMs.
#
#   6 June 2016