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    The Verification Academy offers users multiple entry points to find the information they need. One of these entry points is through Topic collections. These topics are industry standards that all design and verification engineers should recognize. While we continue to add new topics, users are encourage to further refine collection information to meet their specific interests.
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    The Verification Academy is organized into a collection of free online courses, focusing on various key aspects of advanced functional verification. Each course consists of multiple sessions—allowing the participant to pick and choose specific topics of interest, as well as revisit any specific topics for future reference. After completing a specific course, the participant should be armed with enough knowledge to then understand the necessary steps required for maturing their own organization’s skills and infrastructure on the specific topic of interest. The Verification Academy will provide you with a unique opportunity to develop an understanding of how to mature your organization’s processes so that you can then reap the benefits that advanced functional verification offers.
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    The Verification Academy will provide you with a unique opportunity to develop an understanding of how to mature your organization's processes so that you can then reap the benefits that advanced functional verification offers.
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  • Power Aware CDC Verification

Power Aware CDC Verification

Power Aware CDC Verification Course | Subject Matter Expert - Kurt Takara  | Formal-Based Techniques Topic

Reducing power consumption is essential to mobile and handheld application chips where reduced power contributes to longer battery life while minimally impacting performance. As more designs incorporate low power strategies, CDC errors are being found in the low power structures. Since low power logic is implemented late in the design cycle, these low power CDC issues are being missed by traditional CDC techniques.

CDC verification has become a mainstreamed tape out criteria. Design teams know that CDC verification is required to avoid metastability issues that result in reliability and functional problems in silicon. However, the low power design techniques are creating new CDC challenges that are not always addressed by traditional CDC methodologies and solutions. For example, leading-edge designs are now employing dynamic voltage and frequency scaling (DVFS) techniques that change the synchronous relationships between clocks. Now, designers must verify voltage domain crossing (VDC) paths in addition to the normal CDC paths. The additional challenge is that the power logic is not represented in the RTL design, but the power information is described in the unified power format (UPF) files. In the design flow, the power logic is not added until the implementation phase, but designers cannot wait until the implementation phase to complete the CDC analysis. Completing the CDC verification on the low power logic at the RTL design phase is critical to reducing the costs of identifying and fixing low power CDC issues.

In the process of helping project teams deploy power aware clock-domain crossing verification, we have discovered new CDC artifacts and developed new CDC techniques. This Verification Academy course describes the low power CDC methodology by discussing the low power CDC challenges, describing the UPF-related power logic structures relevant to CDC analysis, and explaining a low power CDC verification methodology.

You are encouraged to first view Clock-Domain Crossing Verification by Harry Foster that provides the basic CDC course.


Kurt Takara
Static-Based Techniques
Crawl Walk

Sessions

Power Aware CDC Introduction and Overview

Introduction and Overview Session | Subject Matter Expert - Kurt Takara | Power Aware CDC Verification Course

This session introduces the design challenges created by low power designs and the implications that these designs have on CDC verification.

Understanding Low Power Impact on CDC Logic

Understanding Low Power Impact on CDC Logic Session | Subject Matter Expert - Kurt Takara | Power Aware CDC Verification Course

This session describes the impact of low power design techniques on design and CDC logic and also explains dynamic voltage and frequency scaling (DVFS) and its effect on CDC design and verification.

Describing Low Power Logic with UPF

Describing Low Power Logic with UPF Session | Subject Matter Expert - Kurt Takara | Power Aware CDC Verification Course

This session describes the clock-domain crossing requirements for low power designs and explains the CDC issues introduced by power control logic.

Integrating Power Aware CDC into a Design Flow

Integrating Power Aware CDC into a Design Flow Session | Subject Matter Expert - Kurt Takara | Power Aware CDC Verification Course

This session describes a low power verification methodology and how the Questa® Power Aware CDC solution may be integrated into your design flow.

Questa® CDC Power Aware Demo

Questa CDC Power Aware Demo Session | Subject Matter Expert - Kurt Takara | Power Aware CDC Verification Course

This session demonstrates the Questa® CDC Power Aware solution for verifying low power designs including clock domain crossing (CDC) and voltage domain crossing (VDC) paths.

Related Resources

Technical Papers:

  • Effective Elements List and Transitive Natures of UPF Commands
  • Low Power Apps: Shaping the Future of Low Power Verification
  • UPF Information Model: The Future of Low-Power Verification Today
  • Low Power Coverage: The Missing Piece in Dynamic Simulation
  • Random Directed Low-Power Coverage Methodology: A Smart Approach to Power Aware Verification Closure
  • Free Yourself from the Tyranny of Power State Tables with Incrementally Refinable UPF
  • The Fundamental Power States for UPF Modeling and Power Aware Verification
  • Stepping into UPF 2.1 World: Easy Solution to Complex Power Aware Verification
  • Advanced Verification of Low Power Designs
  • To Retain or Not to Retain: How Do I Verify the State Elements of My Low Power Design?
  • Low Power Design and Verification Techniques

Verification Horizons

  • Effective Elements Lists and the Transitive Nature of UPF Commands
  • A New Approach to Low-Power Verification: Power Aware Apps
  • Part 2: Power Aware Static Verification – From Power Intent to Microarchitectural Checks of Low-Power Designs
  • Part I: Power Aware Static Verification - From Power Intent to Microarchitectural Checks of Low-Power Designs
  • PA GLS: The Power Aware Gate-level Simulation
  • Understanding the UPF Power Domain and Domain Boundary
  • Artifacts of Custom Checkers in Questa® Power Aware Dynamic Simulation
  • Power Aware Libraries: Standardization and Requirements for Questa® Power Aware
  • Successive Refinement: A Methodology for Incremental Specification of Power Intent
  • PowerAware RTL Verification of USB 3.0 IPs
  • Taming Power Aware Bugs with Questa®
  • The Evolution of UPF: What's Next?
  • Evolution of UPF: Getting Better All the Time

Related Courses

Formal Coverage

In this course you will learn about formal coverage metrics which can be used to determine when verification on a design block is complete.

Formal-Based Technology: Automatic Formal Solutions

In this course you will learn specific verification challenges and their corresponding formal application.

Formal Assertion-Based Verification

In this course the instructors will show how to get started with direct property checking.

Getting Started with Formal-Based Technology

This course introduces basic concepts and terminology that should be useful by any engineer wishing to mature their formal-based technology skills.

Clock-Domain Crossing Verification

This course directly addresses these issues by introducing a set of steps for advancing an organization's clock-domain crossing (CDC) verification skills, infrastructure, and metrics for measuring success while identifying process areas requiring improvement.

Looking for more CDC training?

Questa® Clock-Domain Crossing (CDC)

Learn about clock-domain crossing (CDC) design and verification and how to use Questa CDC to verify paths between asynchronous clock domains.

Featured Chapter:

  • Basic CDC Verification

Please visit the Functional Verification Library at Mentor Learning Center to view more on-demand videos.

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