[PCB_FORUM] Re: Intelligent Dual Footprints 15.x

Michael,

I also use Viewlogic(epd2004) and would like to use modules. I know if I
take the same schematic and maintain the refdes AND use the same layout
in a new design, the components won't move. However, is this a true
module? For example, I have a negative regulator that has 14 components
and is very sensitive to noise. I would like to build this circuit as a
module just once and be able to call this in as a group. Maintaining net
names and refdes would be nice while we're at it. Is this the procedure
you are using? I'm in the same boat as Kevin is on this one. Can you do
this in Concept?

Regards,

Ron Scott C.I.D.
Texas Instruments
Tel:  214.480.4715
Cell: 972.816.7978
rg-scott@xxxxxx

 
 

-----Original Message-----
From: Michael.Catrambone@xxxxxxxxxx
[mailto:Michael.Catrambone@xxxxxxxxxx] 
Sent: Wednesday, September 29, 2004 11:51
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Intelligent Dual Footprints 15.x
Importance: High


Kevin,

You are 100% correct.. I have Viewlogic on the Front End and I have used
Modules in my designs many times. As long as the reference designators
match on the schematic side you are good to go. I thought I saw a
procedure, some time ago, to pass the Module information forward from a
Viewlogic schematic into Allegro but if I remember correctly it was not
easy to do and took a lot of time to setup. All you need to do on the
Viewlogic side is simply copy the schematic page that contains the
Module circuit and increment the reference designators accordingly.

Michael Catrambone
UTStarcom, Inc.





Kevin McCowan <kmccowan
09/29/2004 11:39 AM


Please respond to icu-pcb-forum@xxxxxxxxxxxxx

Sent by:


To:    icu-pcb-forum@xxxxxxxxxxxxx
cc:
Subject:    [PCB_FORUM] Re: Intelligent Dual Footprints 15.x


I guess I don't understand.
If I place a module with several symbols it still has individual
symbols, right?
If I have a schematic with all of the same components defined in it so I
get a refdes for each component in the module then I should be able to
assign each of those refdes's to their individual components. I don't
need to call the module from the schematic, I just need to place the
module as one piece and then assign the refdes's as required. Is this
wrong? I can't see where it would make any difference.
If you do it as you say, it makes sense, but that isn't an option for
the viewlogic user.
For them they would just place and wire up the same pile of stuff each
time or copy it from one schematic to another as necessary.
Am I missing something?

Kevin

Jean Bratton wrote:
> Because it's not going to be one refdes you're placing, it'll be the 
> IC
and
> all the associated caps etc. In a module you put all the individual 
> parts
in
> as a schematic module, then place that module on the board and all the

> individual parts are placed at one time. Since schematic modules are a

> Cadence creation, only the Cadence schematic tools support it. Since
Steve
> is using VueLogic as his front-end tool, he won't be able to set the
module
> up on the schematic side, so he won't be able to place it on the PCB
side.
>
>
> -----Original Message-----
> From: Kevin McCowan [mailto:kmccowan@xxxxxxxxxxxxxx]
> Sent: Wednesday, September 29, 2004 11:45 AM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: Intelligent Dual Footprints 15.x
>
> But that makes no sense.
> If you have the footprint right why cannot you assign a refdes to the 
> allegro symbol? Why should allegro care what tool the netlist came 
> from once it is imported? It would be like placing a spare component 
> and then once the netlist is in assigning the refdes.
> I could be wrong, but still, it does not add up to me.
>
> Somebody try it, please and let us know.
>
> Thanks,
> Kevin McCowan
> Sr. PCB Designer
> TSI Telsys
>
> Jean Bratton wrote:
>
>>Yes it is, but it only works with Concept and Capture.
>>
>>
>>
>>----------------------------------------------------------------------
>>--
>>
>>*From:* george.h.patrick@xxxxxxxxxxxxxx 
>>[mailto:george.h.patrick@xxxxxxxxxxxxxx]
>>*Sent:* Wednesday, September 29, 2004 11:33 AM
>>*To:* icu-pcb-forum@xxxxxxxxxxxxx
>>*Subject:* [PCB_FORUM] Re: Intelligent Dual Footprints 15.x
>>
>>
>>
>>
>>
>>This is a perfect use for a module.
>>
>>
>>
>>I don't know if you can do this without Concept-HDL, though.
>>
>>
>>
>>--
>>/George Patrick/
>>*Tektronix, Inc.*
>>P.O. Box 500, M/S 39-512
>>Beaverton, OR 97077-0001
>>Phone: 503-627-5272         Fax: 503-627-5587
>>http://www.tektronix.com <http://www.tektronix.com/> 
>>http://www.pcb-designer.com <http://www.pcb-designer.com/>
>>
>>/It's *_my_* opinion, not Tektronix'/
>>
>>    -----Original Message-----
>>    *From:* Design1955@xxxxxxxxxxx [mailto:design1955@xxxxxxxxxxx]
>>    *Sent:* Tuesday, September 28, 2004 17:23
>>    *To:* icu-pcb-forum@xxxxxxxxxxxxx
>>    *Subject:* [PCB_FORUM] Intelligent Dual Footprints 15.x
>>
>>    I have been asked to create a footprint containing the following
>>    information:
>>
>>    A bga containing all of it's fan-out recommended by the spec.
>>
>>    all of it's supporting decoupling caps, connected per the EE's
rules.
>>
>>    So every time I place this component it will have the particular
BGA
>>    and  the supporting caps placed and also routed to the power and
>>    ground pins per the schematic.
>>
>>    I am using 15.2 and VueLogic front end.
>>
>>    Does anyone know if there is a way to make this work as a complete
>>    intelligent footprint you placing it as a block of components with
>>    routing?
>>
>>    Thanks
>>
>>    Steve
>>
>>
>>
>
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