Shahbaz, Invert the second Atmel driver going to clk#, put a 100 ohm parallel resistor across the clock inputs. Ken -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Shahbaz Assad Sent: Friday, June 11, 2010 8:55 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] simulating G45 ARM Atmel controller Hi All, I am doing SI of clock signals of ATMEL G45 ARM microcontroller. I have interface it with DDR2. While doing the pre layout simulation of clock signals in sigxp, the clock pins are models as single ended ibis output but in memory the clock is modeled as differential ibis input. Can any body tell me how to simulate it as i want to simulate the differential clock at memory. Thanks -Shahbaz Assad _________________________________________________________________ Hotmail: Powerful Free email with security by Microsoft. 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 ------------------------------------------------------------------ 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