John, Short on the backside of the board -This is something I have done in the past by placing full arcs on the specific Plane Layer, to prevent connection, and then by running a small trace to another point that is connected to the Plane in question.
This works quite well, although it is very time consuming, and is next to impossible to see once it has been done, and no way to identify in the design to the next guy who works on the project. I was hoping there was another faster or simpler way. JaMi ----- Original Message ----- From: "John M. Cardone" <[EMAIL PROTECTED]> To: "Protel EDA Forum" <[EMAIL PROTECTED]> Sent: Wednesday, January 07, 2004 2:56 PM Subject: Re: [PEDA] [dxp] Controll Connection to Plane by Area > A virtual short on the back side of the pwb (this would require breaking up pwr and gnd > nets) or, > Define a split plane inclosing the pins you dont want connected which would be > associated to a phony net > > JaMi Smith wrote: > > > Is there a way to control the connection to Planes, or specifically forbid them, by > > defining a physical area on the Board? > > > > Is there any other method? > > > > I am thinking of a circumstance such as a BGA where I may have 1 or more connections > > which are "control" inputs to the BGA, and that as such they need to be tied either > > High (VCC) or Low (GND), but which I do not want to connect directly to the Plane in > > the middle of the Board, since I may want to "cut" them loose from that specific > > connection during testing or at some other time. > > > > Is there any other way to do this, short of routing the connection out to a jumper > > pattern outside of the BGA? > > > > Another common area where I might want to do this is with a component where I have > > to put the Decoupling Capacitor(s) on the back side of the board, and I do not want > > the specific via that goes thru the Board to the Power Pin to connect to the Plane > > in the middle of the Board (i.e.: I want to decouple the Pin and not the Plane.) > > > > JaMi > > > > -- > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > >John M. Cardone Electro-Mechanical Dsgn. Engr. Grp. > >M/S 125-14R Mechanical Engineering Section, 352 > >4800 Oak Grove Dr. NASA / Jet Propulsion Laboratory > >Pasadena, Ca 91109 MailTo:[EMAIL PROTECTED] > >Tel: 818.354.5407 Fax: 818.393.4399 > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[EMAIL PROTECTED] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
