Hi Experts, Please give me inline response? 1. Data, DQS, address, and clk are high speed in DDR. Is it necessary to do SI for WE/RE#, CE#, ALE and command latch enable? 2. If the DDR2 is 266MHz, what will be the frequency of command/control signals that are mentioned above? Or tell me the frequency for which I should optimize these signals? Thanks, Shahbaz Assad _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id`969 ------------------------------------------------------------------ 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