[SI-LIST] Re: Non monotonicity in daisy chain topology
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: andrew.riley@xxxxxxxxxxxxxxxxxx
- Date: Thu, 27 Apr 2006 13:39:51 -0400
Andrew
I suspect he means a multiple level T topology or balanced tree, which
if displayed from left to right would look like a rake.
Scott
Scott McMorrow
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Riley, Andrew wrote:
> Howdy,
>
> Mohan mentioned "Rake" topology which is a new one to me and I am having
> a little trouble finding information about it. Would someone point me
> in the correct direction?
>
> Thank you for your time.
>
> Cheers!
> Drew
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of mohan.sithinathan@xxxxxxxxx
> Sent: Thursday, April 27, 2006 4:08 AM
> To: vani.chandrasekharan@xxxxxxxxx; si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Non monotonicity in daisy chain topology
>
>
> Hi Vani-
>
> The daisy chain with multiple loads will encounter this issue and it is
> not a good topology to use - esp for the edge sensitive signals (such as
> clock, interrupts, etc).
>
> The other topology which will avoid this would be "Rake" topology. The
> "T" and "Star" topologies can also be used based on the number of loads
> and distance. But Rake would be best of all.
>
> I tried this in my design. The Rake Topology removes the shelves on the
> edge sensitive signals (which has multiple loads).
>
> -With regards, Mohan S
>
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of vani.chandrasekharan@xxxxxxxxx
> Sent: Thursday, April 27, 2006 10:40 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Non monotonicity in daisy chain topology
>
>
>
> Hi,
>
> I observed an inevitable non monotonic behaviour in the devices which
> come first in the daisy chain after the driver.
> The subsequent devices see reduced effects of non monotonicity, the end
> device with a 10k pull down termination seems to be faring well in terms
> of signal quality. How to mitigate this behaviour, Kindly suggest some
> solutions.
>
> I referred to si-list back mails which has one such discussion on this
> issue, it states that it is a known behaviour of devices in daisy chain
> topology. But I could not find a solution to change this behaviour.
> Please advice.
>
> Thanks and warm regards
> Vani
>
> <SNIP'd>
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