Mar 8, 2006 #1 A aifi Member level 2 Joined Mar 2, 2006 Messages 42 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,672 what happen if hold time is negative? what happen to our slack value?:?:
Mar 8, 2006 #2 N naveenbaskar Newbie level 4 Joined Dec 9, 2005 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,316 aifi said: what happen if hold time is negative? what happen to our slack value?:?: Click to expand... if the hold is negtive. the data is arraving very fast berfore the clock.so we have to insert the data delay buffer.
aifi said: what happen if hold time is negative? what happen to our slack value?:?: Click to expand... if the hold is negtive. the data is arraving very fast berfore the clock.so we have to insert the data delay buffer.
Mar 8, 2006 #3 L linuxluo Full Member level 6 Joined Jul 26, 2002 Messages 331 Helped 7 Reputation 14 Reaction score 3 Trophy points 1,298 Activity points 2,514 hi, that's mean it's a wrapper contain a register, so it's negative .
Mar 9, 2006 #4 A aifi Member level 2 Joined Mar 2, 2006 Messages 42 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,672 hi.. is that negative symbol just to show us that it is a hold time and positive for setup time? if i have negative value for hold time in my library, is it correct to use the following formula to calculate slack: slack(hold time) = arrival time - requered time *i use BUILDGATES for synthesis
hi.. is that negative symbol just to show us that it is a hold time and positive for setup time? if i have negative value for hold time in my library, is it correct to use the following formula to calculate slack: slack(hold time) = arrival time - requered time *i use BUILDGATES for synthesis
Mar 9, 2006 #5 A AlexWan Full Member level 5 Joined Dec 26, 2003 Messages 304 Helped 8 Reputation 16 Reaction score 2 Trophy points 1,298 Activity points 2,692 Hi, Maybe you can change your clock skew for solving it.
Mar 9, 2006 #6 D dr.farnsworth Member level 3 Joined Jan 5, 2005 Messages 56 Helped 15 Reputation 30 Reaction score 14 Trophy points 1,288 Activity points 401 Hi, To get positive slack for hold time can we also increase input delay ?? Dr.farnsworth
Mar 9, 2006 #7 Z zorro Advanced Member level 4 Joined Sep 6, 2001 Messages 1,130 Helped 357 Reputation 712 Reaction score 298 Trophy points 1,363 Location Argentina Activity points 8,913 This was discussed in this board. See: Regards Z
Mar 10, 2006 #8 Y yuenkit Advanced Member level 4 Joined Jan 20, 2005 Messages 107 Helped 6 Reputation 12 Reaction score 1 Trophy points 1,298 Activity points 1,047 what tool are you using? what command u perfomed to get the negative hold time?
Mar 10, 2006 #9 D darylz Full Member level 2 Joined Mar 24, 2005 Messages 129 Helped 5 Reputation 10 Reaction score 1 Trophy points 1,298 Activity points 1,975 hold time requirement?
Mar 13, 2006 #10 F funster Full Member level 4 Joined Jun 30, 2005 Messages 232 Helped 19 Reputation 38 Reaction score 4 Trophy points 1,298 Activity points 2,742 negative hold time occus when the datapath delay is greater than clock path delay. best regards aifi said: what happen if hold time is negative? what happen to our slack value?:?: Click to expand...
negative hold time occus when the datapath delay is greater than clock path delay. best regards aifi said: what happen if hold time is negative? what happen to our slack value?:?: Click to expand...