PDN Tool Custom Lmnt Issue

[jlally]

Hello FPGA Forum, having an issue with the fpga pdn tool (device agnostic from website):

1. The value of “Custom-Lmnt” in the Decap Selection Tab is not being set to the capacitors “Custom-Lmnt” from the Library Tab, instead it’s being set to the “Custom-Lmnt” of the capacitor value that’s in the same relative position in the Library Tab.
2. For Example see the attached screen shots below of the Library & Decap Selection tabs from a design I’m doing:
1. In the library Tab the 4.7uF capacitor on the bottom row has it’s “Custom-Lmnt” set to 0, and the 0.001uF capacitor on the top row has it’s Custom-Lmnt set to 1.19nH.
2. So in the Decap selection tab was expecting the Lmnt of 4.7uf to be 0, but instead it’s 1.19nH.

Note that the ESR & ESL in the Decap Selection are being picked up as expected, i.e. in this case they’re 0 in both the Library & Decap selection Tabs.

Can you please advise:

1.   Is this is a bug or if not how I'm mistaken?
2.   If a bug:
   1. When can we expect a fix ?
   2. Is there a way to work around the spread-sheet password protection so we can implement a fix while the spread-sheet update is pending?

Thank you,

-John

[Farabi]

Hello John, 

May I know what version of PDN and for what device are you using? 

regards,
Farabi

[jlally · Accepted solution]

Hi Farabi,

   The PDN Rev is 1.1, see screen shot below.  Program is classified, can't share device.

-John

[Farabi]

Hi John, 

I am afraid this is bug in PDN calculation. I need more information on the device in order for me to file a bug report, you dont have to give the exact part number, but device family information would do. 

regards,
Farabi

[jlally]

Hi Farabi,

   Unfortunately, the best I can do at this time is to let you know I've downloaded the 28nm_pdn_hid_04_27 PDN tool and that's working.

-John

[Farabi]

Hi John, 

I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.

regards,

Farabi