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SusanB's avatar
SusanB
Icon for New Contributor rankNew Contributor
4 years ago

How to fix Power Estimation Confidence: Low: user provided insufficient toggle rate data

In my design, I have a 6b x 12b multiplier that is inferred from code that is essentially if(rising_edge(clock)) then if (clock_enable = '1') then result <= num_6b * num_12b; end if...
Farabi_Altera's avatar
Farabi_Altera
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hello,

The way to get power estimates with high confidence is to use the toggle rate that comes from simulation or user-entered assignments. Refer to the "Confidence Metric Details" section in the link below,
https://www.intel.com/content/www/us/en/programmable/documentation/osq1513989409475.html

That being said, the way to tell the Power Analyzer Tool to use toggle rate from the simulation is with a vcd file. Here is a small guide to generate a vcd file in ModelSim,
https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd07062010_692.html

regards,
Farabi