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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 Patterns Library contains a collection of solutions to many of today's verification problems. The patterns contained in the library span across the entire domain of verification (i.e., from specification to methodology to implementation—and across multiple verification engines such as formal, simulation, and emulation).

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    No one argues that the challenges of verification are growing exponentially. What is needed to meet these challenges are tools, methodologies and processes that can help you transform your verification environment. These recorded seminars from Verification Academy trainers and users provide examples for adoption of new technologies and how to evolve your verification process.

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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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  • Clock-Domain Crossing

Clock-Domain Crossing

Clock-Domain Crossing

This topic focuses on asynchronous signal domain crossing design and verification techniques such as Clock-Domain Crossing (CDC), Reset Domain Crossing (RDC), as well as power-aware and gate-level domain crossing analyses.

Featured Session

When Are You Done Running CDC?

When Are You Done Running CDC? Session | Chris Giles - Subject Matter Expert

In this session you will learn whether or not you might still have asynchronous clock or reset issues lurking in your design, despite having identified the crossings, ensured synchronizers are present, and reviewed your code – or even already run CDC analysis, ensuring that all CDCs are solid.

CDC Verification Courses

Power Aware CDC Verification

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

In this course, you will learn 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.

Clock-Domain Crossing Verification

Clock-Domain Crossing Verification (CDC) Course | Subject Matter Expert - Harry Foster | Formal-Based Techniques Topic

This course introduces a set of steps for advancing an organization’s clock-domain crossing (CDC) verification skills, infrastructure, and metrics.

Questa® CDC Resources

  • Featured
  • Articles
  • White Papers
  • Seminars
  • On-Demand
  • Blog Posts
  • Product Information
  • Training

Success Story

  • Northwest Logic Automates Verification of Clock Domain and Reset Domain Crossings Using Questa CDC and Questa RDC

Seminar Sessions

  • Integrated Approach to Power Domain/Clock-Domain Crossing Checks
  • My Experience with Questa® CDC Bring-Up

Press Release

  • Mentor Graphics Expands Formal Verification's Reach with New Cross-Platform GUI and Apps for Sequential Logic Equivalence Checking and CDC Gate-Level Analysis

Featured CDC-Based Techniques Verification Horizons Articles

  • Don’t Forget the Protocol! A CDC Protocol Methodology to Avoid Bugs in Silicon
  • Comprehensive CDC Verification with Advanced Hierarchical Data Models
  • Reset Verification in SoC Designs
  • RTL CDC Is No Longer Enough — How Gate-Level CDC Is Now Essential to First Pass Success

Industry CDC-Based Techniques Articles

  • How to achieve accurate reset domain crossing verification
  • First-Time FPGA Success Requires Exhaustive Examination of Clock-Domain Crossings
  • Crossed Wires On Domains
  • How Automated CDC Protocol Verification Accelerates Testing Processes
  • Automating the Pain Out of Clock-Domain Crossing Verification

Featured CDC-Based Techniques White Papers

  • A Specification-Driven Methodology for the Design and Verification of Reset Domain Crossing Logic
  • Clock-Domain Crossing Challenges in Latch Based Designs
  • Comprehensive CDC Verification Using Advanced Hierarchical Data Models
  • Systematic Speedup Techniques for Functional CDC Verification Closure
  • Power Aware CDC Verification of Dynamic Frequency And Voltage Scaling (DVFS) Artifacts
  • Accelerating CDC Verification Closure on Gate-Level Designs
  • Five Steps to Quality CDC Verification

Featured CDC-Based Techniques Seminar

  • CDC Technology Tips for Success

Featured CDC-Based Techniques On-Demand Technical Sessions

  • When Are You Done Running CDC?
  • Confronting Inevitability: Finding Clock and Reset Issues Before They Find You
  • Why Reset Domain Crossing Verification is an Emerging Requirement
  • Clock-Domain Crossing Analyses and Verification
  • Integrated Approach to Power Domain/Clock-Domain Crossing Checks
  • What Is CDC Protocol Verification, Prevent Bugs in Your Silicon
  • Questa CDC - Verifying CDC Reconvergence with Silicon-Accurate Models
  • Industrial-Strength Clock-Domain Crossing Verification

Featured CDC-Based Techniques Blog Posts

  • Significantly Improve Your FPGA Design Reliability by Using Custom CDC Synchronizers
  • No One Expects Gate Level CDC Verification and Glitch Detection for ASIC Signoff!
  • How to Avoid Metastability on Reset Signal Networks, a/k/a Reset Check is the New CDC
  • Are You Struggling to Reach Timing Closure with Your Low Power Design – You May Have CDC Problems!
  • Back to School: How to Educate Yourself and Your Colleagues About Formal and CDC Verification

Questa®, the Industry’s Most Comprehensive and Easy-To-Use Clock- and Reset- Domain Crossing Verification

Designers increasingly use advanced multi-clocking and reset signal distribution architectures to meet the high-performance, low bring-up latency, and low-power requirements of their chips. The Questa® Clock-Domain Crossing (CDC) and Questa® Reset Domain Crossing (RDC) verification solutions focus on the interaction between clock or reset domains that simply cannot be dealt with by simulation-based verification techniques.

Learn more | Questa® CDC Datasheet | Questa® RDC Datasheet

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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