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AR# 17549

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


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?


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