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Setup and Hold time violations

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vlsitechnology

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CROSSTALK

IF agressor and victim are moving in the same direction how do we get setup violation?
 

Re: CROSSTALK

There will be some hold time violations instead.
 

Re: CROSSTALK

If the aggressor and victim are moving in the same direction, the victim net switches faster. This may lead to hold violation.

There will be a setup violation if both the aggressor and viction are switching in different direction. (In this case, there is a crosstalk induced delay as the victim net switches slowly).
 

Re: CROSSTALK

maybe setup violation if it occured in your clock capture path
 

Re: CROSSTALK

even i want an answer to the question...how will victim be effected if the aggressor switches in the same and different direction?
 

CROSSTALK

same direction: victim net speeds up
different direction: victim net slows down

as eric said, if the net speedup occurs in the (capture) clock path, the clocks will be skewed and could lead to a setup violation
 

Re: CROSSTALK

Its bcoz of coupling capacitance between them....

Here when victim switches in same direction with aggressor then victim signal speeds up leading it to cause HOLD VIOLATION in SIGNAL PATH.....
if it is a clock path then it causes SETUP VIOLATION......
 

Re: CROSSTALK

ljxpjpjljx said:
setup time violation maybe more critical!
Click to expand...

both setup violation and hold violation are critical...
More dangerous is hold violation......
 

Re: CROSSTALK

hi,

hold violations are more critical than setup. bcoz for solving setup violation u can chage the operating frequency and can make ur chip work. but if there is hold violations then the functionality cant be achieved. the chip function will be failed.

Thanks..

HAK..
 

Re: CROSSTALK

hiral.kotak said:
hi,

hold violations are more critical than setup. bcoz for solving setup violation u can chage the operating frequency and can make ur chip work. but if there is hold violations then the functionality cant be achieved. the chip function will be failed.

Thanks..

HAK..
Click to expand...

dats RIGHT.....
 

Re: CROSSTALK

When the switching windows of the aggressor and victim nets overlap and the nets switch in opposite directions, crosstalk will increase the delay of the victim net, which may result in setup violations. When the nets switch in the same directions, crosstalk will reduce the delay of the victim net, which may result in hold violations
 

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