UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 17549

6.1 NGDBUILD - NDGBUILD does not translate the PULLUP/PULLDOWN constraint placed on the Instance name

Description


Keyword: ISE, NGDBUILD, constraint, NET, INST, PULLUP, PULLDOWN, instance, name



Urgency: Hot



General Description:

I placed a PULLUP constraint on one of the instance names of my design:



INST "pad_instance_name" PULLUP;



When I look to the implemented design in FPGA Editor, the PULLUP is not used in the IOB. How can I activate the pullup?

Solution


The PULLUP/PULLDOWN constraints placed on a Instance name are not supported by the implementation tool.



The above constraints must be placed on pad net names:



NET "pad_net_name" PULLUP;
AR# 17549
Date Created 09/03/2007
Last Updated 10/11/2011
Status Archive
Type General Article