Actually it's a 8 - 1/3 mil grid. If your system doesn't support true 8 - 1/3 mil grids you can't use an 8.3333 mil grid since the routes won't go 3 between on 100 mil center pins once you get too far away from the origin. This grid by the way allows you to get 3 between 100 mil pins and that's about it. We don't really use it any more since the advent of fine pitch surface mount.
--------------------------------------------------------------------------------------------
Randy McHugh
Optimum Design Inc.
266 Corporate Drive
Madison, WI 53714
Voice: (608) 243-9418
Fax: (608) 243-9420
Email: [log in to unmask]


-----Original Message-----
From:   John D. Morin [SMTP:[log in to unmask]]
Sent:   Wednesday, December 09, 1998 5:48 AM
To:     [log in to unmask]
Subject:        [DC] Routing Grid

Does anyone know the significance of routing signals on an 8.333 mil
grid? This is a customer requirement on a PCI card.

        Also where can I find PCI Rev 2.1 Spec?

                                Thanks
                                John
 ______________________________________________________________

                EMCAD ENGINEERING SERVICES
 ______________________________________________________________

        John D. Morin
        Design Manager                  (978) 694-9224 (Voicemail)
        EMCAD Engineering Services Inc. (978) 694-1072 (Fax)
        226 Lowell St.                  [log in to unmask] (Email)
        Wilmington, MA 01887            http://www.emcad.com

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