Hello, Kedar, A word of caution on reflected wave switching: the voltage at the receiver could overshoot (above Vcc or below GND) and damage the MOS gate oxide. The damage might not be immediately apparent in testing. It could show up as reduced lifetime in the field. Simulation is highly recommended for checking overshoot and for optimizing terminations. - Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@xxxxxxxxxxxxxx -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Kedar P Apte Sent: Wednesday, February 01, 2006 10:56 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Reflected Wave Switching - Silly Question. Hi All Gurus, I am trying to understand basics of reflected wave routing. If I am making a PCB which has an onboard PCI bus then, I will be deciding topology & making calculations for number of loads C, L Tpd etc. and deciding the trace length = 2 round trip delay in a very general manner. this will be true considering PCI driver = capacitive Mos input stage, rise/fall time as per PCI specs. (4V/ns if I am not wrong). Leaving these 2 major parameters what is different in PCI driver....? Can I use the reflected wave routing strategy for any on board processor/ram bus or so which has cmos drivers with the same rise/fall time...? Will that work by doing all required calculations and simulations....? I apologies if I am wasting your time but this will help me understand basics more. Thanks & Regards, Kedar http://www.patni.com World-Wide Partnerships. World-Class Solutions. _____________________________________________________________________ This e-mail message may contain proprietary, confidential or legally privileged information for the sole use of the person or entity to whom this message was originally addressed. Any review, e-transmission dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this e-mail in error kindly delete this e-mail from your records. If it appears that this mail has been forwarded to you without proper authority, please notify us immediately at netadmin@xxxxxxxxx and delete this mail. _____________________________________________________________________ ------------------------------------------------------------------ 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