I'm reminded of a biblical reference....... Give a man a termination and terminate him for a day or project. Teach a man to terminate and he can terminate for a lifetime. If you really want it this easy, then I humbly suggest that you talk to your memory controller supplier and as him for the memory interface design guidelines. They will give you board impedance requirements, routing guidelines (length matching, etc) and the termination scheme. Should you see the latter, then I humbly suggest that you make use of google as there are a number of fantastic docs available to explain the whys of DDR2 address and other termination. I also humbly suggest you research ODT as that has quite a bit to do with how the data lines can work properly and why it was included from DDR to DDR2. FYI, and FWIW. That is all........... -Michael. And all this science they don't understand Is just my job six days a week..... We will either find a way or make one -Hannibal In the middle of every difficulty lies opportunity -Al Einstein On Thu, Mar 11, 2010 at 9:23 AM, Ragesh <rageshmb@xxxxxxxxx> wrote: > Hi Guru's, > Which is the preferred termination for DDR-2 address lines? the > configuration is 2 devices sharing address lines. > > 1) One 50E parallel termination to Vtt at the split. > 2) Two 100E resistors each at the devices. > > The maximum length for any address line is less than 2 inches and the DDR-2 > frequency is 533. > > Reagrds > RaGZ & AVM > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > -- Best Regards, Michael C. Greim ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu