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The Problem with Reset Domain Crossings

The Problem with Reset Domain Crossings
by Bernard Murphy on 05-14-2020 at 6:00 am

Reset button

Design complexities in reset, like everything else in big SoC designs, has become incredibly complex, for all sorts of reasons. Long, long ago reset was something you just did once, when you turned the power on. Turn on, then hold reset for some amount of time until everything is in a known starting state, and off you go. Nice and simple.… Read More


What’s New in CDC Analysis?

What’s New in CDC Analysis?
by Bernard Murphy on 04-06-2020 at 6:00 am

Validating assumptions in CDC constraints

Synopsys just released a white paper, a backgrounder on CDC. You’ve read enough of what I’ve written on this topic that I don’t need to re-tread that path. However, this is tech so there’s always something new to talk about. This time I’ll cover a Synopsys survey update on numbers of clock domains in designs, also an update on ways to… Read More


SpyGlass Gets its VC

SpyGlass Gets its VC
by Bernard Murphy on 03-26-2020 at 6:00 am

VC SpyGlass Lint

It’s a matter of pride to me and many others from Atrenta days that the brand we built in SpyGlass has been so enduring. It seems that pretty much anyone who thinks of static RTL checking thinks SpyGlass. Even after Synopsys acquired Atrenta, they kept the name as-is, I’m sure because the brand recognition was so valuable.

Even good… Read More


Prevent and Eliminate IR Drop and Power Integrity Issues Using RedHawk Analysis Fusion

Prevent and Eliminate IR Drop and Power Integrity Issues Using RedHawk Analysis Fusion
by Mike Gianfagna on 03-24-2020 at 10:00 am

Screen Shot 2020 03 14 at 5.36.37 PM

I had the opportunity to preview an upcoming SemiWiki webinar on IR drop and power integrity. These topics, all by themselves, have real stopping power. Almost everyone I speak with has a story to tell about these issues in a recent chip design project. When you combine hot topics like this with a presentation that details the collaboration… Read More


Achieving Design Robustness in Signoff for Advanced Node Digital Designs

Achieving Design Robustness in Signoff for Advanced Node Digital Designs
by Mike Gianfagna on 03-09-2020 at 10:00 am

Synopsys SemiWiki STARRC Webinar 1

I had the opportunity to preview an upcoming webinar on SemiWiki that deals with design robustness for signoff regarding advanced node digital designs (think single-digit nanometers). “Design robustness” is a key term – it refers to high quality, high yielding SoCs that come up quickly and reliably in the target system. We all… Read More


Navigating Memory Choices for Your Next Low-Power Design

Navigating Memory Choices for Your Next Low-Power Design
by Mike Gianfagna on 02-27-2020 at 10:00 am

Memory options

Choosing a memory architecture can be a daunting task. There are many options to choose from, each with their own power, performance, area and cost profile. The right choice can make a new design competitive and popular in the market. The wrong choice can doom the whole project to failure.

Vadhiraj Sankaranarayanan, senior technical… Read More


Hybrid Verification for Deep Sequential Convergence

Hybrid Verification for Deep Sequential Convergence
by Bernard Murphy on 02-26-2020 at 6:00 am

Hybrid Verification Synopsys

I’m always curious to learn what might be new in clock domain crossing (CDC) verification, having dabbled in this area in my past. It’s an arcane but important field, the sort of thing that if missed can put you out of business, but otherwise only a limited number of people want to think about it to any depth.

 

The core issue is something… Read More


Edge Computing – The Critical Middle Ground

Edge Computing – The Critical Middle Ground
by Mike Gianfagna on 02-21-2020 at 10:00 am

Computing hierarchy

Ron Lowman, product marketing manager at Synopsys, recently posted an interesting technical bulletin on the Synopsys website entitled How AI in Edge Computing Drives 5G and the IoT. There’s been a lot of discussion recently about the emerging processing hierarchy of edge devices (think cell phone or self-driving car), cloud… Read More


How Good is Your Testbench?

How Good is Your Testbench?
by Bernard Murphy on 01-29-2020 at 6:00 am

Limitations of coverage

I’ve always been intrigued by Synopsys’ Certitude technology. It’s a novel approach to the eternal problem of how to get better coverage in verification. For a design of any reasonable complexity, the state-space you would have to cover to exhaustively consider all possible behaviors is vastly larger than you could ever possibly… Read More


Useful Skew in Production Flows

Useful Skew in Production Flows
by Tom Dillinger on 12-13-2019 at 6:00 am

The concept of applying useful clock skew to the design of synchronous systems is not new.  To date, the application of this design technique has been somewhat limited, as the related methodologies have been rather ad hoc, to be discussed shortly.  More recently, the ability to leverage useful skew has seen a major improvement,… Read More