Apr 14, 2010 #1 J jason7361 Newbie level 4 Joined Apr 14, 2010 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,317 Hi! I have question on how voltage, process, and temperature will affect setup and hold time violation, can anyone explain to me? What's the worst case ? what's the best case? Thank you.
Hi! I have question on how voltage, process, and temperature will affect setup and hold time violation, can anyone explain to me? What's the worst case ? what's the best case? Thank you.
Apr 14, 2010 #2 koggestone Member level 4 Joined Oct 16, 2008 Messages 77 Helped 36 Reputation 72 Reaction score 28 Trophy points 1,298 Activity points 1,828 Re: What does VPT influence setup/hold time? Anyone can help setup time ( Maxtime) violations occurs when things get slower hold time (Mintime) violations occurs when things get faster. So How do things get slower ? - Slower PMOS - Slower NMOS - Lower Voltage - Higher Temperature or Lower Temperature (Due to Temperature Inversion) So setup time (worst case) is run at sslh or ssll corner similarily how do things get Faster ? - Faster PMOS - Faster NMOS - Higher Voltage - Lower Temperature So Hold (Best case) is run at ffhl corner also the industry standard name is PVT ( its not VPT)
Re: What does VPT influence setup/hold time? Anyone can help setup time ( Maxtime) violations occurs when things get slower hold time (Mintime) violations occurs when things get faster. So How do things get slower ? - Slower PMOS - Slower NMOS - Lower Voltage - Higher Temperature or Lower Temperature (Due to Temperature Inversion) So setup time (worst case) is run at sslh or ssll corner similarily how do things get Faster ? - Faster PMOS - Faster NMOS - Higher Voltage - Lower Temperature So Hold (Best case) is run at ffhl corner also the industry standard name is PVT ( its not VPT)
Apr 14, 2010 #3 J jason7361 Newbie level 4 Joined Apr 14, 2010 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,317 Re: What does VPT influence setup/hold time? Anyone can help Thank you for replying, I got it.
Apr 16, 2010 #4 K kumar_eee Advanced Member level 3 Joined Sep 22, 2004 Messages 814 Helped 139 Reputation 276 Reaction score 113 Trophy points 1,323 Location Bangalore,India Activity points 4,677 @koggestone, well said. Thats the reason people will always characterize their libraries for various PVT corners. Some thing like fast-fast, typical, slow-slow & etc.
@koggestone, well said. Thats the reason people will always characterize their libraries for various PVT corners. Some thing like fast-fast, typical, slow-slow & etc.