*From*: "smartliu" <liushuyao0825@xxxxxxx>*To*: <si-list@xxxxxxxxxxxxx>*Date*: Thu, 5 Jul 2007 22:43:24 +0800

Hi All£º I have a puzzle about SSN,As we know SSN is a infrequent probability affair£¬Whether we will pay more attention on SSN in our design. How to evaluate the probability of 30 or 50 I/O buffers turn to high or low at the same time£¿ Which one is bigger£¿ The probability of 30 or 50 I/O buffers turn to high at the same time or the probability of IC invalidation? If we can't evaluate the probability of 30 or 50 IO buffers turn to high at the same time,what is the meaning of simulating the SSN? A few years ago,there are some SSN problem in our logic design.We put more GND or POWER pins in the same bank this year£¬ the SSN will not appear again in our products.That is to say I should not acare the SSN problem now,Am I right? If some one did some good ensample on the SSN,will you share with me some advice ------------------------------------------------------------------ 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: http://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: http://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

**Follow-Ups**:**[SI-LIST] Re: SSN***From:*Andrew Ingraham

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- » [SI-LIST] SSN - elie issa
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- » [SI-LIST] Re: SSN - Dave Chengson
- » [SI-LIST] Re: SSN - steve weir
- » [SI-LIST] Re: SSN - elie issa
- » [SI-LIST] Re: SSN - steve weir
- » [SI-LIST] Re: SSN - elie issa
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