Hi I am using DDR2 SODIMM of 200 pin interface(2GB) with Virtex5 and it is working fine only the problem is with one byte as because of DQ and DQS# (3) by mistake these are interchanged while routing the board on DDR2 module. EDK is used for DDR2 and it is not allowing in changing UCF file to swap these P and N signal. And if it is tried then EDK changing all constraints. Has any one face this problem and solve it ? Thanks in Advance Ms. Saira Shaikh Cricket on your mind? Visit the ultimate cricket website. Enter http://cricket.yahoo.com ------------------------------------------------------------------ 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 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