Stats

  • Locked Locked
  • Replies 1
  • Subscribers 64
  • Views 12993
  • 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

Latch Behavior Problem in IFV

archive

Hi,

maybe someone has an idea where the problem is.

1) In the design I test, I have some latches (clk latches).
2) For some reason, the output of the latches goes to 'U' (in purple) when the latch is closed (in cex). When the latch is transparant the output is fine.
3) I have several latches, it does not happen on all of them
4) When I insert a cutpoint on the output of the latch with the 'U', the 'U' is gone (in cex)
5) When I run the cex with the -dynamic switch, the 'U' is also gone and the latch seems to work fine.

The main problem now is that I can't trust the cex due to the incorrect latch behavior.

Thanks for your support,
Tom



Originally posted in cdnusers.org by Thomas666

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.