Jun 4, 2015 #1 ivlsi Advanced Member level 3 Joined Feb 17, 2012 Messages 883 Helped 17 Reputation 32 Reaction score 16 Trophy points 1,298 Activity points 6,868 Hi All, Is there a thumb rule what values should be used for the clock uncertainty? Let's say, will 20% of clock period for the setup checks and 5% for the hold checks be good enough? Thank you!
Hi All, Is there a thumb rule what values should be used for the clock uncertainty? Let's say, will 20% of clock period for the setup checks and 5% for the hold checks be good enough? Thank you!
Jun 4, 2015 #2 A artmalik Full Member level 5 Joined Mar 13, 2013 Messages 253 Helped 91 Reputation 182 Reaction score 85 Trophy points 1,308 Location San Diego Activity points 2,997 This information is mainly determined by the PLL design which is a source of clock jitter(uncertainty). it is dependant on the clock speed as well depth of the clock. I don't think there is any "rule of thumb" as it is very design specific.
This information is mainly determined by the PLL design which is a source of clock jitter(uncertainty). it is dependant on the clock speed as well depth of the clock. I don't think there is any "rule of thumb" as it is very design specific.