[SI-LIST] Re: PDN related
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: Scooby Doo <si.scooby@xxxxxxxxx>
- Date: Mon, 15 Mar 2010 11:05:43 -0400
With a handle like yours, you deserve a short answer. No.
I suggest some additional reading on I/O PDN design and some Scooby Snacks
Scooby Doo wrote:
> Hi SI Experts,
>
>
> I have a question reg PDN.
>
> Suppose an FPGA has 100 I/O pins with 10 VCCO/Gnd pairs. So an average of 10
> I/O pins for 1 VCCO/Gnd pair. Assume each I/O pin driving 10pf load.
>
> My qn is, to make the clean PDN, is it enough to provide 100pf of capacitor
> to each Vcc/Gnd pair?
>
> I am not convinced with blindly provinding 0.1uF cap to Vcco pins.
>
> kindly clarify.
>
> Thanks in advance for your valuable feedback.
>
> Rajesh
>
>
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Scott McMorrow
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