[PCB_FORUM] Re: Design re-use modules
- From: "gnieski, mike" <gnieski_mike@xxxxxxx>
- To: "'icu-pcb-forum@xxxxxxxxxxxxx'" <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Fri, 3 Sep 2004 10:55:39 -0400
Carl and Mike,
Refreshing is not a problem as long as you place and move the
modules around
correctly. One problem that occurs is that some designers do not
recognize that
the module should be moved as a group, some designers move modules
with symbols,
etch, vias etc turned on without the group button being selected.
What generally
happens is someone places the module initially off the board as a
group and moves
it in the method that I mentioned. If you do this multiple times and
then refresh
the module the refresh places the module in its initial spot off of
the board.
Another problem is in revision control if you have an initial
release of a module
into a library and say have a few boards built at initial rev, then
debug the board
and find that changes to the module are needed, what do you do? Make
the changes
to the initial module and keep the same name? Change the name of the
module to
reflect a rev change? If you change the name then the refresh goes
out the window.
What Cadence needs is some type of replace module similar to a
replace padstack where
you could pick an exsisting placed module and substitute it with the
updated/upreved
module. Not sure how this would work exactly.
Another annoying thing with modules in 14.2 (havent gotten into 15
yet) is if you
use one base design with multiple stackups you need a separate mdd
for each unique
stackup.
thanks,
Mike Gnieski
Desciple of All World Al Craver
-----Original Message-----
From: Musetti, Carl [mailto:cmusetti@xxxxxxxxxxxxxxxx]
Sent: Friday, September 03, 2004 10:31 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Design re-use modules
Mike,
You can not refresh modules with allegro studio, but can with expert
not sure about designer. Supposedly Studio performance is the same as
designer. I have studio performance and can not refresh modules which is a
major pain in the neck I have no issues with placement as a matter of fact
placement really save time in replicated reuse modules. Routing is quirky on
allegro when you leave dangling traces to connect at the top level. Split
planes are supported but sometimes nets don't get instantiated properly to
the shape. No issues with ATE or Pick and Place. I can give you a lot more
details feel free to call me. I wrote a paper with Gopi Rudra (Cadence Orcad
Developer) on this topic and presented it at last years ICU conference. This
is the kind of material and education you can get from attending the ICU
conferences. It is not to late to sign up for this years!
http://www.cadenceusers.org/conferences/current/CFP.html
************************************************************
* Carl T. Musetti Infinicon Systems *
* Tel: 610-233-4828 680 American Ave, Suite 100 *
* Fax: 610-233-4777 King of Prussia, PA 19406 *
* cmusetti@xxxxxxxxxxxxx *
************************************************************
-----Original Message-----
From: Mike Barham [mailto:mbarham@xxxxxxxxxxx]
Sent: Friday, September 03, 2004 9:51 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Design re-use modules
Hi everyone,
Can anyone share their use of design re-use modules with Orcad/Allegro ?
I have modules working with Orcad10/Allegro15.1 but is anyone using them for
place/route/Split planes/ATE? And does anyone ever 'refresh' the modules ?
Appears in need of a strict process control but then again what doesn't !
Regards,
Mike Barham
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