Since you sent this to the PCI list too (but apparently not the CompactPCI list) ... In the PCI interface, TRST# is active-low. The PCI specification requires you to bus and pull TRST# down on the system board, with a ~5K resistor, if JTAG is not used. This would hold the on-card boundary scan logic in a reset state. Then it can be driven high by ICT when you want to use it. Andy ------------------------------------------------------------------ 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