Stats

  • Locked Locked
  • Replies 9
  • Subscribers 91
  • Views 15185
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

CTS with MMMC

SINGI

HI

 

I am working with 40nm TSMC library, according to adavanced chip implementation tech., CTS needs the following:

Clock routing with 2X width and 2X spacing.

Include double Via and clock sheilding.

 I cld succussfullly  get 2X spacing, and shielding but have prbs with 2X width and vias.  According to cadence soc encounter manual, I can use NONDEFAULTRULE to  CTS 2 use wide wires and for this I need to put in the lef files, the 2X width. But wen i try to run CTS, i have the following errors and tools crashes.(i use setCTSMode -routeNonDefaultRule widenwires)

 


globalDetailRoute

#Start globalDetailRoute on Thu Aug 13 15:19:22 2009
#
#cpu time = 00:00:00, elapsed time = 00:00:00, memory = 1942.00 (Mb)
#WARNING (NRDB-411) spacing table for LAYER M1 is already defined. Ignore this one.
#WARNING (NRFL-333) line 106: edge checked min area rule already exists. Cannot overwrite it with a new one. Ignore the new one.
#WARNING (NRDB-411) spacing table for LAYER M2 is already defined. Ignore this one.
#WARNING (NRFL-333) line 192: edge checked min area rule already exists. Cannot overwrite it with a new one. Ignore the new one.
#WARNING (NRDB-411) spacing table for LAYER M3 is already defined. Ignore this one.
#WARNING (NRFL-333) line 277: edge checked min area rule already exists. Cannot overwrite it with a new one. Ignore the new one.
#WARNING (NRDB-411) spacing table for LAYER M4 is already defined. Ignore this one.
#WARNING (NRFL-333) line 362: edge checked min area rule already exists. Cannot overwrite it with a new one. Ignore the new one.

 

please let me know solution.

 Thank you 

 Sing 

Parents

  • Dear Kari

     Thank you for reply, its correct not add ecorepeaters to clock path. I tried all the post route opt options and since my design very small and the main objective is speed. I have no much options left else for adding buffers  to clock path. It worked perfectly fine before 2X width and shielding but now it crashes. 

    One more question the tool crashes if I add a repeater to data path also which is not normal. Any reasons ?

     

    SING 

Reply

  • Dear Kari

     Thank you for reply, its correct not add ecorepeaters to clock path. I tried all the post route opt options and since my design very small and the main objective is speed. I have no much options left else for adding buffers  to clock path. It worked perfectly fine before 2X width and shielding but now it crashes. 

    One more question the tool crashes if I add a repeater to data path also which is not normal. Any reasons ?

     

    SING 

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.