For regular PCI (I don't have a CompactPCI spec handy), the maximum frequency is 33.333...MHz. The minimum clock cycle time is exactly 30.0ns. You could run it at 33.0MHz, or 25MHz or 21.69073MHz or 1KHz or whatever, as long as the period is no shorter than 30ns. Regards, Andy > Can you tell me what the exact frequence must be for compact-PCI. > Is this 33MHz or 33.33333MHz???? > Please let me know asap. > ------------------------------------------------------------------ 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 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