Larry, I would completely agree with you on the need to separate the discussion between I/O core core power distribution. Today is the first time I actually have a chance to read the actual article in EE times that starts the original discussion and I am convince that the intend of the article is on I/O SSO noise, not core noise impact on the FPGA. May be it's just me but the first figure in the article looks really funny. The current flow direction in the figure for 0->1 or 1->0 seems to be in reversed direction of what the actual flow should be. What do you think ? Needless to say, they are I/O switching current, not core. -----Original Message----- From: Larry SMITH [mailto:Larry.Smith@xxxxxxx] Sent: Thursday, January 06, 2005 11:28 AM To: zhang_kun@xxxxxxxxxx Cc: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Article discussion on bad packages - I/O and core It would help if we would use the SSN language when referring to I/O PI and transient current language when referring to core. This will help to reduce confusion and emotional mis-interpretations. The core and I/O PI problems are significantly different and need to be handled differently in our hardware architectures. By breaking the PI problems down to these levels, I believe we can come to better agreement on how to handle them. (But then maybe some of the "entertainment appeal" of SI-list will be lost!) regards, Larry Smith Sun Microsystems ------------------------------------------------------------------ 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