Your sweet tooth could depend on your ability to digest sugar  BBC Science FocusView Full coverage on Google News

One of the key goals for USB4 is to retain compatibility with the existing ecosystem of USB3.2, USB 2.0 and Thunderbolt  products, and the resulting connection scales to the best mutual capability of the devices being connected. USB4 is designed to work with older versions of USB and Thunderbolt . USB4 Fabric support high throughput interconnects of 10 Gbps (for Gen 2) and 20 Gbps (for Gen 3) and supports Thunderbolt 3-compatible rates of 10.3125 Gbps (for Gen 2) and 20.625 Gbps (for Gen 3). It becomes very important to verify the Thunderbolt  backward compatibility with the designs. Though the support of USB4 Interoperability with Thunderbolt  3 (TBT3) is optional in USB4 host or USB4 peripheral device and required USB4 Hub and USB4 Based Dock but it is very essential to work in the existing ecosystem. 

Few Main features of USB4 Interoperability with Thunderbolt  3 (TBT3) Systems

• Support for Bi-Directional Pins & Retimers: TBT3 Active Cables can contain two bidirectional Re-timers which have the capability to send AT Responses on its RX channel. Router connected directly to such Retimer needs to support A Router that is connected directly to a bidirectional Re-timer shall support reception of Transactions on both TX and RX channels. 

• Bounce Mechanism: This feature is used by Router to access the Register Space of a Cable Re-timer that can only be accessed by its Link Partner.
• Asymmetric Negotiation: The Router which connects with Cable Retimers needs to follow Asymmetric TxFFE in Phase 5 of Lane Initialization. 
• USB4 Link Transitions: In TBT3 mode, the configuration of two independent Single Lane Links can be used non-transient state or Single Lane Link just using the Lane1 Adapter.

Cadence has a mature USB4 Verification IP solution that can help in the verification of USB4 designs with TBT3. Cadence has taken an active part in the Cairo group that defined the USB4 specification and has created a comprehensive Verification IP that is being used by multiple members. If you plan to have a USB4-compatible design, you can reduce the risk of adopting new technology by using our proven and mature USB4 Verification IP. Please contact your Cadence local account team, for more details.

In SoC development, the verification cycle is a crucial phase that ensures products meet their specifications and function correctly. However, the complexity of modern SoC projects, with their constant data flow, multiple validation teams working in parallel, and tight schedules, presents significant challenges. This article explores these challenges and introduces Verisium Manager as a solution that embodies the 'One Tool Fits All' concept. This means that Verisium Manager is designed to handle all aspects of the verification process for SoC development, from planning to coverage analysis to regression testing, thereby addressing the complex needs of SoC verification.

The Hurdles in Traditional Validation Cycles

 A typical validation process involves planning, coverage analysis, and regression testing. This complexity is compounded by using separate tools for each activity, leading to multiple control environments, APIs, and databases, not to mention the array of tool owners. Such fragmentation results in constant data transfer and translation between systems, from the planning tool to the coverage analysis tool and then to the regression testing tool. This continuous movement of data causes delays, system instability, poor user experiences, and, ultimately, a dip in the quality of the validation process.

The use of multiple platforms leads to inefficiency and reduced productivity. What's needed is a unified system that can streamline the workflow, simplify the verification process, and enhance its effectiveness.

Envisioning the Ideal Solution: Verisium Manager

 The cornerstone of an efficient validation cycle is integration and simplicity. The ideal solution is a singular platform that consolidates planning, coverage analysis, and regression management into one smooth, unified process. Verisium Manager emerges as this much-needed solution, encompassing all the functionalities necessary to streamline the validation process. Its comprehensive nature instills confidence in its ability to handle all aspects of the verification cycle. It can be fully customized to address and enforce any validation methodology and can facilitate smooth integration into any customer environment.

Features that stand out in Verisium Manager include: 

• Unified Workflow: It acts as a single cockpit from which all activities are orchestrated, ensuring the validation teams' work is uninterrupted and seamlessly integrated.
• Customization and Integration: Verisium Manager supports customizing test-plan structures and mapping results per project, ensuring a perfect fit for various project requirements. Its ability to smoothly integrate into the project's environment and compute platforms is unparalleled.
• Support for Continuous Updates and Migration: The tool accommodates constant updates to project data and supports the migration of legacy data, ensuring that no historical data is lost in the transition to a new system.

Addressing Project-Specific Needs

 Verisium Manager recognizes diversity in different projects and offers project-specific solutions, including:

 Enforcing Project Test-Plan Structures and Attributes: It supports and enforces each project's unique test-plan structure and mapping guidelines.

• Unified Data Views and Measurements: Verisium Manager promotes a unified view of data across all teams and enforces unified measurements, ensuring consistency and clarity in the validation process.
• Enabling Project-Specific Actions and Integrations: The tool is designed to support project-specific actions directly from its graphical user interface and allows for smooth integration with in-house databases, dashboards, and the project execution stack.

Verisium Manager is the epitome of efficiency in software/hardware validation. Its differentiating features, such as support for customization, unified data view, and comprehensive coverage and regression requirements, make it an indispensable tool for any validation team looking to elevate their workflow.

Designers have long recognized the need to analyze the reliability of ICs. Two commonly used approaches for performing reliability analysis include calculating the change in device degradation and relying on safe operating checks in circuit simulators. 

With the advent of the ever-increasing use of ICs in mission-critical applications, the need for reliable reliability analysis has become of paramount importance. Over the years, you have been using reliability analysis in Virtuoso ADE Assembler and Virtuoso ADE Explorer to measure and review aging effects, such as device characteristic degradations, model parameter changes, self-heating effects, and so on.

Reliability analysis can be performed using two modes: Spectre native and RelXpert. The reliability analysis analyzes the effect of time on circuit performance drift and predicts the reliability of designs in terms of performance. In ADE Assembler, you can run the reliability simulation for fresh test (when time is zero), stress test (to generate degradation data), and aged test (at specific intervals, such as one year, three years, or 10 years). In the stress test, extreme environmental conditions are used to stress devices before aging analysis.

The following figure shows the reliability simulation flow.

The Reliability Options form has the following four tabs: 

• Basic: Enables you to specify analysis type, aging options, start and stop time of reliability simulation, and options related to device masking, degradation ratio, and lifetime calculation. 

• Modeling: Enables you to choose the modeling type you want to use during reliability simulation. 

• Degradation: Enables you to specify the options to print device and subcircuit degradation information into a .bt0 file. 

• Output: Enables you to specify the degradation reports to be generated and methods to filter degradation results in the reports.

While the Basic and the Output tabs are used by design engineers, the Modeling and the Degradation tabs are primarily used by model developers.

Reviewing degradation reports in text or XML formats can be a tiresome exercise because degradation data can be large and can contain a large number of instances due to advanced technology nodes and post-layout simulations. For you to work effectively and interactively with these reports, the new reliability report is based on the SQLite database, which adds the benefit of improved performance and capabilities of sorting and filtering reliability data using SQLite operators.

As they say, watching this in action might help you more than reading about it, so please take a look at our Training Bytes video channel, which offers many helpful videos on how to run Reliability Analysis in Virtuoso Studio.

All the related videos are linked together in a channel so that you can easily access and watch as many as you like.

Reliability Analysis in Virtuoso Studio

Want to Learn More?

For lab instructions and a downloadable design, enroll for the online training courses of your interest on

Reliability Analysis in Virtuoso Studio vIC23.1 (Online)

 Training is also available as "Blended" or "live" class.

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If you have questions about courses, schedules, online, public, or live onsite training, reach out to us at Cadence Training.

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About Knowledge Booster Training Bytes

Knowledge Booster Training Bytes is an online journal that relays information about Cadence Training videos, online courses, and upcoming webinars that are available in the Learning section of the Cadence Learning and Support portal. This blog category brings you direct links to these videos, courses, and other related material on a regular basis.

Niyati Singh

On behalf of the Cadence Training team

Hello everyone,

For my cross-coupled oscillator design, I have a problem with stability analysis. Based on my achieved results which are attached, where is my design problem?

Best,

https://ibb.co/bgKFP4N

https://ibb.co/3FGRLmV

https://ibb.co/pwSZDSF

Read through this blog to know more about the new Reliability Report view in Virtuoso ADE Assembler and Virtuoso ADE Explorer.(read more)

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