Quickpath papers - circuits and implementation

By: Ricardo B (ricardo.b.delete@this.xxxxx.xx), March 19, 2017 8:07 am
Room: Moderated Discussions
slacker (s.delete@this.lack.er) on March 18, 2017 6:50 pm wrote:
> Ricardo B (ricardo.b.delete@this.xxxxx.xx) on March 17, 2017 6:08 pm wrote:
> > Aaron Spink (aaronspink.delete@this.notearthlink.net) on March 17, 2017 10:25 am wrote:
> > >
> > > The reality is that QPI is not a traditional clk_fwd design. In a lot of ways, QPI electrical
> > > is more similar to an AC coupled embedded clock system. Actually using embedded clocks has
> >
> > I guess it has adjustable delay lines on each data line,
> > and the data transitions are used to adjust the delay?
>
> I did some searching, and I came across two papers that may be of interest to you. The first is a paper
> on clocking in Nehalem, including the delay line used in Quickpath clock receivers (see section III):
>
> Next Generation Intel Core Micro-Architecture (Nehalem) Clocking
>
> The second is specifically dedicated to the Rx clocking circuit. For some
> reason, this paper hasn't received much attention from anywhere, but it's
> a very high quality paper that easily could have been published at ISSCC:
>
> Intel Core i5-i7 Quickpath Interconnect Receiver Clocking Circuits and Training Algorithm
>

Cool, thanks.
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                Infinity Fabric = PCIeAaron Spink2017/03/16 10:58 AM
        Infinity Fabric = PCIeGabriele Svelto2017/03/16 03:48 AM
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              Infinity Fabric = PCIeAdrian2017/03/16 07:58 AM
                Infinity Fabric = PCIeRicardo B2017/03/16 09:16 AM
                  Infinity Fabric = PCIeMichael S2017/03/16 09:54 AM
                    Infinity Fabric = PCIeRicardo B2017/03/16 10:07 AM
                      Infinity Fabric = PCIeMichael S2017/03/16 02:33 PM
                        Infinity Fabric = PCIeGabriele Svelto2017/03/17 03:35 AM
                          Infinity Fabric = PCIeAaron Spink2017/03/17 10:25 AM
                            Thanks, your posts on this thread have been extremely informative (NT)Gabriele Svelto2017/03/17 01:08 PM
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                              Infinity Fabric = PCIeAaron Spink2017/03/17 06:27 PM
                              Quickpath papers - circuits and implementationslacker2017/03/18 06:50 PM
                                Quickpath papers - circuits and implementationRicardo B2017/03/19 08:07 AM
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                    Infinity Fabric = PCIeMichael S2017/03/16 02:45 PM
                      Infinity Fabric = PCIeAaron Spink2017/03/16 11:21 PM
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