so does the Electra router do fan outs that are nice so that you don't have to do them manually?
Dennis Saputelli Mike Reagan wrote: > > Emanuel, > I forgot to mention you can also use the layer assignment in classes. This > also works well. I have found this be hard to set in Spectra. > > Mike Reagan > > -----Original Message----- > From: Emanuel Zimmermann [mailto:[EMAIL PROTECTED] > Sent: Wednesday, January 21, 2004 11:03 AM > To: Protel EDA Forum > Subject: Re: [PEDA] Antwort: Antwort: Autorouter > > Mike > > Thanks for this detailed answer. It seems that I have to try the "classes > trick" to get design rules easier to specctra. I was not aware of this - > currently we work with manually edited .rul files. > > Emanuel > > --- > MPL AG www.mpl.ch > Emanuel Zimmermann [EMAIL PROTECTED] > Manager R&D Phone: +41 56 483'34'34 > Taefernstrasse 20 Fax: +41 56 493'30'20 > > CH-5405 Daettwil > --- > > "edsi" <[EMAIL PROTECTED]> schrieb am 21.01.2004 14:16:46: > > > Emanuel > > We also suspect Protel is at fault for the 28 mil holes. I think it > > is a default in Protel setup. > > As far as High Speed design rules, You will need to stick with > > spectra for now, since Electra does not support differential pairs > > of matched lengths. I did not try blind and buried vias, but I did > > use prerouted "via in pad". Electra was cleaner since it let these > > connections alone and I did not have to create any "forget" commands. > > We also tested the "BUS" command on both routers. The test board was > > a simple backplane with identical connectors on same Grid. Spectra > > was slightly better however, neither Electra or Spectra routing > > would be acceptable with this command. > > One thing we did notice....since both routers use a "manhattan" > > topology to place traces, On large busses, Electra has very few > > loops. It sticks to the floorplan very well. I have a tendency to > > use the "limit way" command on most of my designs. This forces the > > router to lay traces parrallel to each other on the same layer. This > > increases the density of the routing. Limit way is a little tighter > > on Spectra. I ran tests on both routers, using limit way then ran > > test without limit way. In both cases, Electra managed 500-700 less > > vias out of 7800. > > > > What I was most impressed with was that it left the locked preroutes > > tollally alone. Honestly, this is the first router that this worked > > with. If you think Spectra is leaving them alone, look closly at > > your design. On some occasions it place traces either over or > > around your preroutes. The only way to avoid this is to create > > "forget" classes. > > > > Here is the way the classes and DSN file works in Protel. Protel > > does not export classes. I wish it would. If you want to create > > widths lets say for DATA D0-D7, created a classs called DAT0_7, then > > create and invidual width rule for that class. When Protel exports > > the DSN file , it will assign an INDIVIDUAL rule to the nets in the > > class. The same applies to via type, toplogy, max via, and > > clearance. Protel extracts the class and breaks it down to net. > > That is perfectly fine ...perhaps cumbersome but it works. You > > still may want to look at this router. ELecta is working on adding > > High Speed rules > > > > > > Mike Reagan > > EDSI > > Frederick MD > > > > -- _______________________________________________________________________ Integrated Controls, Inc. Tel: 415-647-0480 EXT 107 2851 21st Street Fax: 415-647-3003 San Francisco, CA 94110 www.integratedcontrolsinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *