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AR# 44103 13.3 Bitgen - 7 Series - DriveDONE option is no longer available as a bitstream generation option

Description

For 7 Series devices the DriveDONE option will no longer be available as a bitstream generation option from ISE 13.3 software. It will be removed from the Documentation and Software. Does this mean that my device will not configure if I do not use an external pullup resistor?

Solution

Configuration should complete even in the case where you do not have an external pullup resistor for DONE. Changes have been made to the DONE structure for 7 Series.

  1. Addition of a stronger internal pullup
  2. Removal of the setup/hold need/requirement for DONE

An additional software change has also been made. The "DonePipe" option is now turned on by default. This will allow fortheinsertion ofa second register to the DONEsignal prior to being read by any logic. The DonePipe change is documented in (Xilinx Answer 44237).If the "DonePipe"option is disabled, then an external pullup needs to be added.

These changes make the DONE transition more robust andnot proneto issues with slow rise time than previous families. The DONE pin can still be used to drive an LED using an appropriate external resistor value.

Actions

AR# 44103
Date Created 11/08/2011
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Kintex-7
  • Artix-7
  • Virtex-7
  • Virtex-7 HT
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