[PCB_FORUM] Re: Design Reuse From Existing Designs
- From: "Davies, Charles (cdavies)" <cdavies@xxxxxxxxxx>
- To: "'icu-pcb-forum@xxxxxxxxxxxxx'" <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Fri, 11 Mar 2005 11:32:22 -0500
The Design Reuse paper can be found at http://www.gcsd.harris.com/icu2004
<http://www.gcsd.harris.com/icu2004> .
Looking at the constraint issue at a very high level, constraints will not flow
up from the child to the parent unless they are implemented as net level
properties in the schematic. There are ways to force this to happen using place
holder properties on the schematic and back annotating the values. Version 15.5
should resolve most of these issues. As long as your are using net level
properties, the inheritance should occur without issue.
Charlie
-----Original Message-----
From: Andy_Kulik@xxxxxxx [mailto:Andy_Kulik@xxxxxxx]
Sent: Friday, March 11, 2005 11:19 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Design Reuse From Existing Designs
Charlie Davies wrote an excellent paper on Design Reuse. May be can share the
URL to it
Also there is an ok manual in the doc folder of the CDN install
Andy
Kevin Buchanan
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03/11/2005 11:14 AM
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[PCB_FORUM] Re: Design Reuse From Existing Designs
Hi Steve,
We are just getting into this ourselves. But have you clipped the
constraint areas. Also, have you exported the constraints from CM
and imported them into the module?
There are just my thoughts, I have not applied them yet.
Buck...
-----Original Message-----
From: Mariani, Stephen [mailto:smariani@xxxxxx]
Sent: Friday, March 11, 2005 11:07 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Design Reuse From Existing Designs
I am creating a module from an existing design. I have done the following:
1, Read in the tec file from the existing board and imported it to the Module.
2, Read in the new tel file to the module.
3, Took existing (board I want to copy from) and exported the placement.
4, Read the placement into the module, that placed only the components I needed
for the module.
5, Clipped all the traces, vias and fills from existing board from specific
area.
6, Imported clip files to the module.
Now I notice all the traces are missing properties. I am necking down inside
fine pitch BGA's and I have a ton of trace width errors. Does anyone know how to
import the net properties to my existing module?
I tried reading in the netlist with properties but not sure this is the best
way?
Thanks
Steve
Stephen Mariani
Mercury Computer Systems, Inc.
199 Riverneck Road
Chelmsford, MA 01824
Phone: (978) 967-1855
Fax: (978) 244-0520
<mailto:smariani@xxxxxx> mailto:smariani@xxxxxx
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