Are you asking how to measure the skew between two asynchronous or synchronous clocks of the same frequency on a FPGA/ASIC ? The problem with many questions that come across this list is they need to be better described. Measured is a relative term. To what degree measured? Steve Salkow Lockheed Martin 3200 Zanker Road San Jose, CA 95134 (408) 473-4058 (san Jose) (408) 742-4162 (Sunnyvale) steven.salkow@xxxxxxxx salkow@xxxxxxxxxxxx (925) 462-1075 Home (925-) 487-5946 Cell (408) 468-7271 Numeric Pager -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Yiran Chen Sent: Monday, October 18, 2004 8:29 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Any basic idea about on-chip clock skew detection? Hi, guys Do you know how to measure two clock signal's skew by using some on- chip method? Such as circuit and so on? If not, how could we do it offchip? need two pin and two same-length wires or...? Many thanks. Yiran ------------------------------------------------------------------ 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