| Author |
Message |
vlsirocks
Joined: 03 Sep 2007
Posts: 3
|
 03 Sep 2007 14:05 Effects of Max Tran Violations |
|
|
|
I am trying to understand what will happen if I do not fix the max tran violations .
If my timing i smeeting and I have Max transition violations will my design work ? Please comment.
Thanks ..
|
|
| Back to top |
|
 |
deh_fuhrer
Joined: 25 Jul 2006
Posts: 422
Helped: 28
|
| 03 Sep 2007 15:41 Re: Effects of Max Tran Violations |
|
|
|
| vlsirocks wrote: |
I am trying to understand what will happen if I do not fix the max tran violations .
If my timing i smeeting and I have Max transition violations will my design work ? Please comment.
Thanks .. |
The violation of maximum output transition simply means that you are trying to drive a load with a weak driver. So the output voltage will not go upto the full level. Which eventually leads to logic failure...
|
|
| Back to top |
|
|
vlsirocks
Joined: 03 Sep 2007
Posts: 3
|
| 04 Sep 2007 13:07 Re: Effects of Max Tran Violations |
|
|
|
Thanks Deh ... Other than upsizing the driver what are the other possibilities to fix the max tran violation ?
I guess the tool priority to fix the DRC is the highest and then the setup and hold violations are fixed ? Is my understanding correct ?
Please let me know.
Thanks ..
|
|
| Back to top |
|
|
eexuke
Joined: 25 Mar 2004
Posts: 198
Helped: 6
|
| 05 Sep 2007 1:55 Effects of Max Tran Violations |
|
|
|
| The max violation may cause large short circuit power since both PMOS and NMOS would be on for a longer period of time.
|
|
| Back to top |
|
|
shelkerahul
Joined: 08 Feb 2005
Posts: 80
Helped: 5
Location: Bangalore
|
| 06 Sep 2007 10:51 Re: Effects of Max Tran Violations |
|
|
|
| Another reason to fix transition violation is, Library will be characterized till certain value of transition. If you are exceeding that value then your library will not be having delay information in look up table for that transition. So whatever timing analysis you do, will not be correct, for particular instance.
|
|
| Back to top |
|
|
jitendra
Joined: 20 Aug 2004
Posts: 58
Helped: 3
Location: India
|
| 06 Sep 2007 10:57 Re: Effects of Max Tran Violations |
|
|
|
Foundries specify limit on transition value beyond which they do not assure that chip will work, in other words transition violations may be one of the reasons for chip failure.
You can either increase drive strength of driving cell or insert buffer immediately after driving cell to fix transition violations.
|
|
| Back to top |
|
|
