Prasad, what do you timing models say your margin is at these temperatures? Steve At 07:01 PM 9/28/2004 +0530, saprasad wrote: >Hi All, >Here is the details of problem we are facing: > >We have developed the GP7000 Main Board V1.0 which is running at 258 MHz, >while the version 1.2 developed at production site is running at 250 MHz >at normal temperature. > >Client is testing the board at 65 deg chamber temperature. At this >temperature the board stops working because the temperature at CPU will be >near to 70 deg. Please note that the CPU and Memory are commercial grade. >As per client's past experience, other products are running above 70 deg >temp at 200 MHz. > >Is it possible to know what will happen to the CPU-Memory interface >running at 250MHz at 70 deg ? >The failure is due to component operating temperature range or due to some >synchronization loss between Memory and CPU? >What will be the behavior (impedance, rise time, fall time effect) of >tracks at 70 deg ? > >We have track length of 4 inch between CPU(S3C2410) and >Memory(HY57V561620B). Whether this is playing any role at higher temperature? > >Please advise us if you have any suggestions to sort out this problem. > >Regards, >Prasad >------------------------------------------------------------------ >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