AR# 17549

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

描述


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?

解决方案


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
日期 10/11/2011
状态 Archive
Type 综合文章
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