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PDN tool for Cyclone V HPS

Altera_Forum
Honored Contributor II
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Hi, everybody. 

I'm trying to use PDN2 tool to calculate decoupling capacitors. It's not clear how to include HPS core dynamic current into calculations. In the report (PowerPlay Power Analyzer->Current Drawn From Voltage Supplies) VCCIO_HPS : 0 mA, VCCPD_HPS: 0 mA, VCC_HPS: 12.88 (static), 0 (dynamic), but in HPS Power Calculator Dialog Box it is said that for 2 cores HPS power consumption is 1.4 W. Does it mean that I have to assign 1.4/1.1 V = 1.27 A value for VCC_HPS power rail in the PDN table?  

Also gate-level simulation for Cyclone V isn't available, so I'm not sure that Power Analysis is precise... 

 

I use de0-nano-soc as a reference and see that guys from Terrasic use a lot of capacitors with different values (so it seems they used PDN tool too), but I get for my project about 4-5 capacitors for 3.3 V and 4-5 capacitors for 1.1 V and that seems suspicious :)
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