AR# 44103

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


For 7 Series devices, the DriveDONE option will no longer be available as a bitstream generation option from ISE 13.3 design tools. 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?


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 devices.

  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 for the insertion of a second register to the DONE signal 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 and not as prone to issues with slow rise time as in previous families. The DONE pin can still be used to drive an LED using an appropriate external resistor value.



Answer Number 问答标题 问题版本 已解决问题的版本
44237 13.3 - Bitgen - 7 Series - DonePipe option is now enabled by default N/A N/A
AR# 44103
日期 06/05/2013
状态 Active
Type 综合文章
器件 More Less