Feb 3, 2005 #1 M mic_huhu Member level 3 Joined Dec 16, 2004 Messages 63 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 499 How to fix hold time err How to add constraints in dc script to fix hold time ? e.g. for multicycle 2 clock period
How to fix hold time err How to add constraints in dc script to fix hold time ? e.g. for multicycle 2 clock period
Feb 3, 2005 #2 S smith_kang Member level 5 Joined Jan 22, 2005 Messages 89 Helped 4 Reputation 8 Reaction score 3 Trophy points 1,288 Activity points 861 Re: How to fix hold time err hi you can delay the data wrt the clock so that the data does not change for a specified amount of time after the arrival of clock. in dc you can use dc_shell> set_fix_hold<clock_name>r reoptimize_design -in _place
Re: How to fix hold time err hi you can delay the data wrt the clock so that the data does not change for a specified amount of time after the arrival of clock. in dc you can use dc_shell> set_fix_hold<clock_name>r reoptimize_design -in _place
Feb 3, 2005 #3 T tony_taoyh Full Member level 2 Joined Oct 20, 2004 Messages 131 Helped 6 Reputation 12 Reaction score 3 Trophy points 1,298 Activity points 1,785 How to fix hold time err I think it is better NOT to fix hold time violation in DC, it is better to do it in P&R....Because the timing model is more accurate... For the multiple cycle path, you must set the constranint as followings: set_multiple_cycle_path -setup 2 -from ... -to ... set_multiple_cycle_path -hold 1 -from ... -to... The second line is very important... (please refer to DC manual..) then set_fix_hold//// Hope help you...
How to fix hold time err I think it is better NOT to fix hold time violation in DC, it is better to do it in P&R....Because the timing model is more accurate... For the multiple cycle path, you must set the constranint as followings: set_multiple_cycle_path -setup 2 -from ... -to ... set_multiple_cycle_path -hold 1 -from ... -to... The second line is very important... (please refer to DC manual..) then set_fix_hold//// Hope help you...