[SI-LIST] Re: SDRAM problem
- From: "Kai Keskinen" <kalevi@xxxxxxxxxx>
- To: <peter.zhu@xxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Wed, 15 Sep 2004 20:27:48 -0400
Peter:
I've done a lot of work with similar interfaces. The SDRAMs tend to have
really fast edge rates and if you are lightly loaded, even a fairly short
track length will give you a large overshoot or undershoot and lots of
reflections if you are not careful. Simulation is your best approach before
building.
Kai
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of peter zhu
Sent: Wednesday, September 15, 2004 5:13 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] SDRAM problem
All:
Deos any encounter SDRAM data bus SI problem without series resistor(10 ohm)
on data bus?
I meet such problem in Miron 512Mb SDRAM chip working with Marvell 64260
bridge. This problem result in CPU unstability. When I change to Samesung
512MB SDRAM chip. the problem disappear.
Peter
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