kenny, what kind of impedance did you ask? Buffer output impedance for interface or normal trace impedance on board? On 12/1/06, Jory McKinley <jory_mckinley@xxxxxxxxx> wrote: > Hello Kenny, > Are you designing this type interface? If so then take a look at the AMCC > spec: > https://www.amcc.com/MyAMCC/retrieveDocument/PowerPC/440EP/PPC440EP_DS2002_v1_24.pdf > > There should be some board guideline information for the DDR interface. You > will have to simulate. > > Simulating an existing interface? If you can obtain a board file then the > traces (impedances) can be extracted for the interface. > > -Jory > > > Kenny Frohlich <kenny_frohlich@xxxxxxxxx> wrote: Hi All, > Can someone please tell me where I can find information on DDR2 impedances > (ie. what is the impedance of CLK? Data? Address? Command?)? > We use PowerPC PPC440EP and on-board DDR2 SDRAMs. > Thank you. > > Regards, > Kenny > > --------------------------------- > Access over 1 million songs - Yahoo! Music Unlimited. > > ------------------------------------------------------------------ > 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 FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > > List technical documents are available at: > http://www.si-list.org > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > > > --------------------------------- > Access over 1 million songs - Yahoo! Music Unlimited. > > ------------------------------------------------------------------ > 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 FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > > List technical documents are available at: > http://www.si-list.org > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu