[SI-LIST] Re: PCIX A/D WIDTH Min
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: brahim@xxxxxxxxxxxx
- Date: Thu, 06 Jun 2002 09:52:46 -0700
Brahim,
When you perform these simulations, make sure that you have a good model
of the PCI-X device packages which include signal-to-signal coupling and
power/ground modeling. You will find that most of the noise on a PCI-X
bus is developed in the package before the signals reach the PCB, and
due to the low impedance drivers that reflected reverse crosstalk often
saturates within the package.
As for the minimum trace width, that is dependent upon your board
manufacturer, stackup and trace impedance. Typically most PCI-X boards
are manufactured with 5 mil trace widths.
Regards,
scott
--
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
Brahim Koudssi wrote:
>Dear SI list,
>
>
> I am designing a PCIX board and I would like to simulate the bus using
>Hspice to determine
> the minimum and maximum trace length of Address/Data, A/D lines.
>
> My question is the following:
>
> If I am to represent A/D as a pulse signal, what's the minimum A/D
>Twidth I should use?
>
>Assume Tclk=7.5ns
>
>Thanks,
>Brahim
>
>
>------------------------------------------------------------------
>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
>
>
>
>
>
------------------------------------------------------------------
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
Other related posts:
