Thursday, January 08, 2009     Register | Login | Search | Contact Us
     
   
     
     

Many of you already received communications about the move of the Cadence user community into cadence.com. And many of you have already joined, with over 4000 registrations in the first two weeks.

The new Cadence Community enhances the ability of Cadence users to connect and collaborate. In addition to moving the community into cadence.com -- enabling single sign-on for community, Sourcelink and Cadence events -- the new site is organized around nine technology segments, giving you easy access to product information, training, forums and blogs. Some of the new features include:
  • Ability to respond to posts via e-mail
  • Technology-specific blogs
  • Latest Web 2.0 social networking capabilities
  • Public profile options
  • Private messaging
  • Friends lists
Visit the new Cadence Community today at www.cadence.com/community and join the discussions!

Registration note: Due to the scope of the enhancements and the new SSO registration system, we were not able to migrate existing cdnusers.org member accounts. So new registrations are required, but this enables a broader set of functionality we think you'll enjoy.

Forum note: Under the guidance of forum moderators, we have taken the 20+ cdnusers.org forums and consolidated them into 11 forums on the new site. Posts have been brought over so you can leverage that posting history. CDNusers forums will be set to read only starting 7/30, and cdnusers.org will be redirected to the new community on 8/4.

Best regards,
Mike and Tom

Michael A. Catrambone - Steering Committee Chairman
Distinguished Engineer
PCB/Mechanical
UTStarcom, Inc.

Tom Diederich
Cadence Community Manager
Home
Forums
Forums > Digital IC > Floorplanning, Place and route

Subject: A warning when doing timing-driven NanoRoute, Urgent!
Posting to forums is available to community members only.
Login or Register
Rate this topic:
   
Author Messages
eminemshow
Posts: 75
Online: User is Offline
6/20/2008 10:05 AM  

#Total number of DRC violations = 2
#Total number of violations on LAYER M1 = 2
#Total number of violations on LAYER M2 = 0
#Total number of violations on LAYER M3 = 0
#Total number of violations on LAYER M4 = 0
#Total number of violations on LAYER M5 = 0
#Total number of violations on LAYER M6 = 0
#Total number of violations on LAYER M7 = 0
#Total number of violations on LAYER M8 = 0
#option droute_honor_min_feature is default to true
#    because min feature/manufacturing grid is defined in the library
#Analyzing pin access.
#Done analyzing pin access.
#WARNING (NR) No sdc file was imported, Timing Analyzer is not called.
#WARNING (NR) Total 176 pins do not have the noise margin specified, in which 176 pins are IO pins. Default rise/fall noise margins 0.400000/0.500000 have been used.
#    48 out of 48 nets are selected for further SI-fixing!

Above is an excerpt from nanoroute log file, the red characters means SDC file is not imported? But I never see setNanoRouteMode can set which SDC file to use. How can I make this WARNING disappear? Need help

BRs
Kari
Posts: 81
Online: User is Offline
6/20/2008 10:20 AM  
I would think nano would grab the SDC file already loaded in the FE session. Did you by chance load the design without the SDC file? Also, have you compared results of timingDriven nano to non-timingDriven? We usually turn on SI prevention, but leave timingDriven off.

- Kari
eminemshow
Posts: 75
Online: User is Offline
6/20/2008 12:08 PM  
Kari,

I am sure that my FE session has SDC file loaded, because I should 1st use 'writeDesignTiming' to dump a timing graph file. I am really confused why this warning happens, is this a bug? (I guess). Anyway, thank you for your reply *^.^*

BRs
Kari
Posts: 81
Online: User is Offline
6/20/2008 2:29 PM  
What version do you see this in? It appears to be a bug in older versions, where this message was printed, but the SDC is in fact read in and timing-driven routing is still performed. In the rest of the route log, do you see timing numbers?

- Kari
eminemshow
Posts: 75
Online: User is Offline
6/20/2008 7:57 PM  
Posted By Kari on 6/20/2008 2:29 PM
What version do you see this in? It appears to be a bug in older versions, where this message was printed, but the SDC is in fact read in and timing-driven routing is still performed. In the rest of the route log, do you see timing numbers?

- Kari

I am now using SOC-E 52 update 5. This version of Encounter also will issue a warning if I didn't give it the '.timing.tif' file, that why I use the 'writeDesignTiming' command 1st to generate a timing file. By the way, I didn't see any timing numbers after NanoRoute, just see a WNS at the very beginning of the globalDetailRoute phase, I think this is the result NanoRoute parsed from the '.timing.tif' file.

BRs
Posting to forums is available to community members only.
Login or Register
Forums > Digital IC > Floorplanning, Place and route > A warning when doing timing-driven NanoRoute, Urgent!


ActiveForums 3.6
     
Copyright 2006 Cadence Design Systems, Inc.