logo
 
 Main Menu
 Tutorials
 Forum
 Who's Online
15 user(s) are online (8 user(s) are browsing Forum)

Members: 0
Guests: 15

more...
 Top Posters
1
jgrad
298
2
ebrunvand
64
3 svchw 47
4
jbakos
36
5 ucgrad 35
6
jamesstine
33
7
ekalenda
33
8 pepet 25
9 reneezl 21
10 ashkan2000 20


« 1 ... 36 37 38 (39)


Re: Post Cadence questions here
Just popping in
Joined:
2005/8/30 22:18
Group:
Registered Users
Posts: 5
Level : 1; EXP : 34
HP : 0 / 8
MP : 1 / 232
Offline
Thanks a lot.

Posted on: 2005/8/31 14:01
Create PDF from Post Print


Re: Post Cadence questions here
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Hi,

looking at the map files from the OSU cells is probably the best starting point for your map file. Its a two step process: first you have to find the layer mappings for your process. Then you plug them into the map file, using the OSU ones as examples.

Most likely you already have a GDS map file for Virtuoso, the foundry should have provided one. Or if you have an Assura techfile, you will also find the mappings there. What you will need is a layer number for each metal layer and each via layer.

Here is an excerpt from the OSU cells:
metal1          NET             49              0
metal1          SPNET           49              0
metal1          PIN             49              0
metal1          FILL            49              0
metal1          VIA             49              0
metal1          VIAFILL         49              0
NAME            metal1/PIN      49              0
NAME            metal1/SPNET    49              0


Each metal layer has a similar entry. For MOSIS SCMOS, metal1 has number 49. We put all metal1 routes on that layer. In addition, we also put all the text labels on the metal1 layer (the last two lines). That is actually not legal, since it would mean we wanted to produce the shape of text on the mask. But we use this as a trick to keep the label associated with the correct wire shape. Later in Virtuoso we use the "Create Pins from labels" feature to replace all those labels with actual rectangular pins. I would suggest you give this method of label mapping a try, it works very well, especially when you have pins stacked on different layers on top of each other.

On the Virtuoso side you will need a matching map file for the GDS import. Here is a matching line to the example above:
metal1          drawing          49              0


This means that all entries on GDS layer 49 are placed on "metal1 drawing". Most likely you already have this map file from the foundry. In the rare case where you don't have one, then you are free to make up any map file you want to. As long as you use the same layer numbers on the Encounter and Virtuoso side it will work just fine.

Johannes

Posted on: 2005/8/30 23:07
Create PDF from Post Print


Re: Post Cadence questions here
Just popping in
Joined:
2005/8/30 22:18
Group:
Registered Users
Posts: 5
Level : 1; EXP : 34
HP : 0 / 8
MP : 1 / 232
Offline
How do I create a MAP file for my process so that i can transport my layout from encounter to Virtuoso? I had a look at the one posted at the IIT ASIC design flow tutorial. how do i create a similar one for my process?

Thanks.

Posted on: 2005/8/30 22:21
Create PDF from Post Print


Re: SPICE
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Its better we don't post it here or else the spam robots will grab it. You can find it in his member profile (see the top posters list).

Posted on: 2005/8/30 19:11
Create PDF from Post Print


Re: SPICE
Just popping in
Joined:
2005/8/29 20:20
From Chicago
Group:
Registered Users
Posts: 8
Level : 1; EXP : 73
HP : 0 / 18
MP : 2 / 500
Offline
I remember James stine telling us about one... could you pass me his mail id. I tried mailing him, it bounced.

Posted on: 2005/8/30 18:39
Create PDF from Post Print


Re: SPICE
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Hi,

I don't have any personal experience with free spice tools, but there seems to be quite a number of them out there. The obvious one is probably the well-known Orcad student demo. Since its PCB oriented I think it is akward to use from an IC perspective, but it is easy to install.

Spice Opus looks promising and should run under Windows:
http://www.fe.uni-lj.si/spice/welcome.html

vrmad posted a nice link with freeware MacOS tools. I believe a number of them could be compiled for Linux as well:
http://epicentertech.biz/services/mac_eda/page5.html

In particular TclSpice looks interesting:
http://tclspice.sourceforge.net/

Hope you find something useful. Keep us updated on your experience

Johannes

Posted on: 2005/8/30 11:19
Create PDF from Post Print


SPICE
Just popping in
Joined:
2005/8/29 20:20
From Chicago
Group:
Registered Users
Posts: 8
Level : 1; EXP : 73
HP : 0 / 18
MP : 2 / 500
Offline
HI

Well i was confused under which of the forums i should post it.

Is there any free software that works similar to HSPICE.

Vikram

Posted on: 2005/8/30 6:28
Create PDF from Post Print


Re: Cadence Skill
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Hi there,

have you checked the Skill User guide and Reference manual? They will probably have the most up-to-date information. You can find the User guide in your IC installation under

./doc/sklanguser/sklanguser.pdf

and the reference guide under
./doc/sklanref/sklangref.pdf


At IIT in particular you can find all Cadence documentation in a more organized fashion at /import/cadence/doc. The IC documentation is at
/import/cadence/doc/IC50.333

There you will find "SKILL Language User Guide.pdf" and "SKILL Language Reference.pdf"

And may this be the last time you have to use Skill
Johannes

Posted on: 2005/8/29 21:15
Create PDF from Post Print


Cadence Skill
Just popping in
Joined:
2005/8/29 20:20
From Chicago
Group:
Registered Users
Posts: 8
Level : 1; EXP : 73
HP : 0 / 18
MP : 2 / 500
Offline
Hello,

Can anyone guide me to a detailed cadence skill tutorial


Posted on: 2005/8/29 20:48
Create PDF from Post Print


Re: Should I use Magic 6 or 7
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Magic 7 may still be the best layout editor for Mosis SCMOS rules. The OSU library ships with a set of techfiles we converted. The new GDS reader flawlessly reads in Cadence Encounter created GDS files, something Magic 6 wouldn't do.

Posted on: 2005/8/8 13:49
Create PDF from Post Print


Re: Should I use Magic 6 or 7
Moderator
Joined:
2005/8/8 8:51
From Oklahoma State University
Group:
Registered Users
FAQ Admins
Posts: 33
Level : 4; EXP : 50
HP : 0 / 87
MP : 11 / 2395
Offline
Tim Edwards (http://bach.ece.jhu.edu/~tim/programs/magic/index.html) has also indicated that as we get smaller in minimum feature size, it may be best not to use Magic. I believe his original post was for 90nm and below.

On the other hand, Magic is a great tool for teaching VLSI and is still useful. Tim does a great job at maintaining the software and giving it great new features for a low price :).

Posted on: 2005/8/8 10:38
Create PDF from Post Print


Getting ready for physical design?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Design Compiler not working? PKS giving you a headache? No problem, post a question here and see what others would suggest.

Posted on: 2005/8/7 20:39
Create PDF from Post Print


Lost in entities and components?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
VHDL is a nice language - with many things that can go wrong. Post a question here, get an answer from a college.

Posted on: 2005/8/7 20:38
Create PDF from Post Print


How does "task" work again?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Stumped with a Verilog problem? Simulation not working? Get only X? No problem, post here and see what others have to say.

Posted on: 2005/8/7 20:37
Create PDF from Post Print


Problems with that library?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Commercial library let you down? No problem, just post in this forum.

Posted on: 2005/8/7 20:36
Create PDF from Post Print


Cell library not working right?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Any problems with the OSU or IIT cells? Just drop a line in this forum, somebody will know the answer

Posted on: 2005/8/7 20:35
Create PDF from Post Print


Like this site? Hate this site?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
See anything you would like improved? Like us? Hate us? Feel free to discuss here and get feedback on what others think.

Posted on: 2005/8/7 20:34
Create PDF from Post Print


Know the latest gossip?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Post anything about the EDA or semiconductor industry in this Forum.

Posted on: 2005/8/7 20:34
Create PDF from Post Print


PDK Vender let you down?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
PDKs are often very powerful, but also hard to use. And support may not always be great. Just post an item here and we will see what we can do.

Posted on: 2005/8/7 20:33
Create PDF from Post Print


Doing Mosis layouts in Virtuoso?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
The NCSU kit is a great addition to Virtuoso, allowing SCMOS compatible layout with absolute dimensions. But sometimes things don't work right. No problem, just put a post in this forum!

Posted on: 2005/8/7 20:32
Create PDF from Post Print


Spent all night running gemini?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Any gemini questions? Just post them here. Gemini is a powerful tool, but can be hard to use at times. No problem, somebody out there knows the answer.

Posted on: 2005/8/7 20:31
Create PDF from Post Print


Sue Schematic question?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Trying to create a schematic in Sue but having problems? Just post your question here

Posted on: 2005/8/7 20:30
Create PDF from Post Print


Question with Irsim?
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Any questions on how to use irsim? Weird message? Simply post here and get an answer.

Posted on: 2005/8/7 20:29
Create PDF from Post Print


Post all Synopsys questions here
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Any comments, suggestions or problems with Synopsys tools? Just post them here and get an answer fast.

Posted on: 2005/8/7 20:28
Create PDF from Post Print


Post Cadence questions here
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Simply post any Cadence related items here and we will try to sort it out.

Posted on: 2005/8/7 20:27
Create PDF from Post Print


Post your Magic questions here
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
Simply post any Magic related question or issue here and we will try to get an answer.

Posted on: 2005/8/7 20:27
Create PDF from Post Print


Re: Should I use Magic 6 or 7
Just popping in
Joined:
2005/8/3 22:10
Group:
Webmasters
Registered Users
FAQ Admins
Posts: 2
Level : 1; EXP : 2
HP : 0 / 0
MP : 0 / 18
Offline
Depends on which techfile you want to use. For Magic 7 you will need to create many of them using a converter and some manual labor. For Magic 6 all of the classic techfiles are setup. However, most of the sub-180nm techfiles are only created for Magic 7, since it supports those features better than Magic 6.

Posted on: 2005/8/4 17:46
Create PDF from Post Print


Should I use Magic 6 or 7
Moderator
Joined:
1969/12/31 17:00
Group:
Webmasters
Registered Users
FAQ Admins
Stats Admin
Posts: 298
Level : 16; EXP : 14
HP : 0 / 378
MP : 99 / 49750
Offline
I want to do some basic layout. Should I go with Magic 6 or Magic 7?

Posted on: 2005/8/3 22:06
Create PDF from Post Print



 Top
« 1 ... 36 37 38 (39)




Powered by XOOPS 2.0 2001-2003 The XOOPS Project