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Subject: Spice to DML
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mbarham
Posts: 1
Online: User is Offline
2/24/2006 5:47 AM  
Hi,

Has anyone converted Spice to S'Quest DML files using SPC2DML.EXE ?

Our IC in question only has a SPICE model and we cannot successfully convert the SPICE model to a dml file after having tried a number of options.

lwang
Posts: 0
Online: User is Offline
2/24/2006 11:30 AM  
Yes, you can use spc2dml for wrapping spice/hspice/spectre device model into DML. However, in the subckt definition, you must have 7 or 8 terminal and have node sequnce correct.

Hope this helps.
riddoch
Posts: 8
Online: User is Offline
3/01/2006 6:33 AM  
But that only helps if you also have the Hspice simulator available as the dml wrapper only effectivly allows the model to be associated with relavant devices not actually simulated using TLSIM (the cadence simulation engine).
You also then need hspice models for all the other items within that are in the simulation as you can run either a tlsim or hspice based simulation not mixed.

From memory the spice to dml converter within model intergity basically blindly adds a dml file header and footer to your spice file. You still have quite a bot of hand editing to get to something that is actually useful.
lwang
Posts: 0
Online: User is Offline
3/01/2006 6:40 AM  
There is another spc2dml like functionality available in Model Integrity (MI), and only in MI right now.

Actually, it is from HSpice transistor-level model to IBIS Buffer (DML afterwords). It uses a HSpice template and simulated HSpice transistor-level model and get the .lis file (output). MI takes this to convert IBIS Buffer model.

Spectre to DML is on-the-way in development.
bipindhavale
Posts: 0
Online: User is Offline
4/21/2006 10:56 PM  
Hi,

I did read abt spc2spc and spc2dml in the previous posts here...I can find spc2spc in my Cadence folders but i'm unable to locate spc2dml in my Cadence folder.
The version I am using is Allegro PCB SI 610. Could anyone point me to the correct name/location of the file on Internet or in local folders.

If i understand correctly, spc2dml would WRAP all my .SUBCKT's to Cadence ESPICE format and generate a dml ! Is that right ?

I do not want to convert the Hspice .LIS files to IBIS and then Convert to .dml.
I'm looking at invoking the HSpice through SigXP.

Thanks,
Bipin Dhavale
Motorola, Bangalore
bipinpd@motorola.com
bipindhavale
Posts: 0
Online: User is Offline
4/26/2006 4:59 AM  
Just incase if anyone's on this group, spc2dml is a new feature released in Cadence PCB SI Version 15.5.

Regards,
Bipin
Donald Telian
Posts: 42
Online: User is Offline
4/28/2006 1:38 PM  
Bipin,

Sounds like you want to run Hspice as the simulator under aSI.  It works quite well, and there's a couple info kits on this site that will help you:

http://www.cdnusers.org/Articles/Download/tabid/163/Default.aspx?title=Wrapping%20Transistor-level%20HSPICE%20IO%20Models%20for%20use%20in%20Allegro%20PCB%20SI

and

http://www.cdnusers.org/Articles/Download/tabid/163/Default.aspx?title=Using%20Hspice%20as%20the%20Simulation%20Engine%20Under%20Allegro%20PCB%20SI

Configuring the models is the toughest part, so start small.  I'd recommend starting with the example/test files in the 2nd link above.

Hope that helps,
Donald
Donald Telian
SI Consultant
telian@sti.net
559-760-5793
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