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fixing hold time problem

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power-twq

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Hello, all friends:

what method is better to fixing hold time,

during DC, or during PACE & ROUTE.

best regards
 

No doubt about it ...During Place and route!
 

yes this is obvious because during place and route, the hold time (time before which the data remains to be valid after the arrival of the clock pulse) voilations can be matched and changes can be made to the specifics.routing is imporant as it determines the wire length and which component to which floor has to connected.

Place and route is very important as it plays a very imporant role in determining the excat place where the component has to placed during the post synthesis procedure. so depending on the place where the components are placed the hold time violations can be avoided.

with regards,
 
P & R , add buf to fix it!
 

if violation is slow,fix in p & r,if violation is fast,fix in synthesis
 

all HOLD violations are fixed during P&R by Back-End tools. never try to fix hold in DC during pre-layout phase. this is absolutely done during P&R
 

setup violation during synthesis, Hold violations during P&R,
Beat Regards,
 

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