Simulation Warning

Sep 15, 2004 1 Replies

Rate this thread:

Naimesh 21 years ago

Hello

I am getting following warning during simulation in ModelSim

Warning: *DFE3C RECOVERY High VIOLATION ON CLR WITH RESPECT TO CLK; # Expected := 1 ns; Observed := 0 ns; At : 61005 ns # Time: 61005 ns Iteration: 1

Can any one tell what is RECOVERY High VIOLATION. Thank for any help

Naimesh

Vote

Chris Alexander 21 years ago

Recovery time is the period of time following a clock that an asynchronous input must remain stable. It is similar to hold time, but for async inputs.

This warning looks like it came from a flip flop model that is telling you that its asynchronous CLR pin wiggled too soon after the rising edge of CLK for the flip flop to operate properly.

Chris

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required