casey480
Junior Member level 1
For characterization purposes, I'd like to know the timing from pin 'reset_b' of my design, through combo logic, thru the 'RB' pin of a specific flop, thru the 'Q' of that same flop, and then to an arbitrary point on my design. This is not a sequential path, and PrimeTime reports all attempts to report it as unconstrained or invalid.
Any tips? Do i need to do a 'set_data_check' command?
Added after 52 minutes:
it looks like ' -enable_preset_clear_arcs' option does what I need in DC, but it doesn't seem to exist in PT. Is there an equivalent?
Added after 14 minutes:
aaannd... I figured it out.
Uou have to explicitly enable checking of such things in primetime, which seems silly at first, as the commands are mostly symmetrical.
set timing_enable_preset_clear_arcs true
Any tips? Do i need to do a 'set_data_check' command?
Added after 52 minutes:
it looks like ' -enable_preset_clear_arcs' option does what I need in DC, but it doesn't seem to exist in PT. Is there an equivalent?
Added after 14 minutes:
aaannd... I figured it out.
Uou have to explicitly enable checking of such things in primetime, which seems silly at first, as the commands are mostly symmetrical.
set timing_enable_preset_clear_arcs true
