r1caw ex ua6bqg
Member level 2
Hi all!
I am trying to set_skew_group on some D flip-flops (which are driven from ICG cells):
Here, I want to include both Dffs in the same skew_group to balance skew in the clock branches. I will define smth like:
set_skew_group -name sg1 {..../Dff_launch/clk ..../Dff_capture/clk };
But after commit_skew_group ICC reports that both Dff cannot be added because they are driven by different ICGs outputs. I thought that ICGs are transparent for this command. So, how I can add this two Dff into the same skew_group?
Yes, I can set_clock_tree_exceptions and balance skew, but I am interested in the set_skew_group command.
Thank you!
I am trying to set_skew_group on some D flip-flops (which are driven from ICG cells):
Here, I want to include both Dffs in the same skew_group to balance skew in the clock branches. I will define smth like:
set_skew_group -name sg1 {..../Dff_launch/clk ..../Dff_capture/clk };
But after commit_skew_group ICC reports that both Dff cannot be added because they are driven by different ICGs outputs. I thought that ICGs are transparent for this command. So, how I can add this two Dff into the same skew_group?
Yes, I can set_clock_tree_exceptions and balance skew, but I am interested in the set_skew_group command.
Thank you!