With the unprecedented increase in semiconductor design size and complexity design teams are required to accommodate multiple design constraints such as multiple power domains for low power design, multiple modes of operation, many clocks running, and third party IPs with different SDCs. As a result timing closure has become… Read More
Tag: sta
Signoff Accurate Timing Analysis at Improved Run-time & Capacity
The semiconductor design sizes, these days, can easily be of the order of several hundred millions of cells, adding into the complexity of verification. Amid ever growing design sizes, it’s a must that the timing verification is done accurately. Normally Static Timing Analysis (STA) is done to check whether all clocks and signals… Read More
Expert Constraint Management Leads to Productivity & Faster Convergence
The SoC designs of today are much more complex than ever in terms of number of clocks, IPs, levels of hierarchies, several modes of operations, different types of validations and checks for growing number of constraints at various stages in the design flow. As a semiconductor design evolves through several stages from RTL to layout,… Read More
Don’t Shoot Yourself in the Foot With Timing Exceptions
Timing exceptions are ways of guiding design tools, primarily synthesis and static timing analysis (STA), but these days also place & route and perhaps other tools. Most paths in a design go from one register to the next register. Both registers are on the same clock, and the design needs to ensure that the signal can make it from… Read More
New Book on Design Constraints
There is a new book out from Springer. The subtitle is actually a better description that the title. The subtitle is A Practical Guide to Synopsys Design Constraints (SDC) but the title isConstraining Designs for Synthesis and Timing Analysis. The authors are Sridhar Gangadharan of Atrenta in San Jose and Sanjay Churiwala of Xilinx… Read More
DAC: Tempus Lunch
I had time for lunch on Monday. That is to say, there was a Cadence panel session about Has Timing Signoff Innovation has become and Oxymoron? What Happened and How Do We Fix It?
The moderator was Brian Fuller, lately of EE Times but now Editor-in-Chief at Cadence (I’m not sure quite what it means either). On the panel were Dipesh… Read More
Ausdia’s Timevision
I met Sam Appleton of Ausdia during DAC. I found it quite hard to understand exactly what they do. I’ve talked before about something that I nick-named City Slickers’ Marketing. It is named after the following exchange from the movie City Slickers:Curly: Do you know what the secret of life is? [holds up one finger] This.… Read More