AR# 22216

7.1 Virtex-4 MAP - "WARNING:PhysDesignRules:729 - Useless IOBDELAY_VALUE set"


General Description: 

When running 7.1i MAP for a design containing Virtex-4 IDELAY, I receive the following warning message: 


WARNING:PhysDesignRules:729 - Useless IOBDELAY_VALUE set. Comp CLK1_IDELAY_O/CLK1_IDELAY_INST is using the Delaychain with a delay type DEFAULT but the IOBDELAY_VALUE is set. This value will be ignored and the default value will be used. 


What does this mean?


This DRC issue will be fixed in version 8.2i so that no warning message will be printed for the default value of 0. Meanwhile, the message can be safely ignored. The default value of 0 will be used.

AR# 22216
日期 05/19/2014
状态 Archive
Type 综合文章