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AR# 35952

Config BitGen - UnusedPin option not pulling up unused I/Os in Virtex-6 devices


Customers using the BitGen "-g UnusedPin:PullUp" option might notice no pull-ups on unused I/Os after configuration.


The "-g UnusedPin:PullUp" option is not working in BitGen versions 11.x and 12.1. This is scheduled to be fixed in ISE software version 12.2.

In the meantime, if you want unused I/Os pulled up, use an external pull-up resistor.

AR# 35952
Date Created 06/02/2010
Last Updated 05/19/2012
Status Active
Type Known Issues
  • Virtex-6 CXT
  • Virtex-6 HXT
  • Virtex-6 LX
  • More
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Less
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
  • More
  • ISE Design Suite - 11.4
  • ISE Design Suite - 11.5
  • ISE Design Suite - 12.1
  • Less