tag: clock domain crossing

Streamlining DO-254 Compliance: The Power Of Automated Clock-Domain Crossing Verification
By Kurt Takara - 11 Dec, 2025 - Comments: 0

In the realm of safety-critical electronic hardware, particularly those governed by DO-254 compliance directives, ensuring design integrity is paramount. One of the most insidious challenges designers face is clock-domain crossing (CDC) violations. When data moves between asynchronous clock domains, it can lead to metastability issues, causing unpredictable behavior, data loss or corruption, an... » read more

Accellera Standard Supports Hierarchical Data Model For CDC And RDC Analysis
By Farhad Ahmed - 13 Nov, 2025 - Comments: 0

The hierarchical flow for clock domain crossing (CDC) and reset domain crossing (RDC) is a methodology used in the verification of large, complex digital integrated circuits. It's a divide-and-conquer approach that significantly improves the efficiency and turnaround time for ensuring design reliability against metastability and other issues at asynchronous boundaries. Questa CDC and RDC sol... » read more

Top Five Trends In RTL Signoff
By Suresh Babu Barla - 30 Oct, 2025 - Comments: 0

By Suresh Babu Barla and Rimpy Chugh The “shift left” of the development cycle is critical for the huge, complex chips used in such applications as AI and high-performance computing (HPC). Identifying design issues at the netlist stage occurs far too late in the design development process. At this point, addressing such problems demands significant effort, primarily because most design-r... » read more

Accelerating Reset Domain Crossing Verification With Data Analytics Techniques
By Reetika - 26 Sep, 2024 - Comments: 0

By Reetika and Sulabh Kumar Khare As the complexity of integrated circuit (IC) designs continues to rise, the task of verifying these designs has become increasingly challenging. The pace of this growth is staggering, with design complexity doubling roughly every 20 months. This exponential increase places immense pressure on verification processes, which must keep up to ensure that these so... » read more

Accellera Preps New Standard For Clock-Domain Crossing
By Brian Bailey - 29 Feb, 2024 - Comments: 0

Part of the hierarchical development flow is about to get a lot simpler, thanks to a new standard being created by Accellera. What is less clear is how long will it take before users see any benefit. At the register transfer level (RTL), when a data signal passes between two flip flops, it initially is assumed that clocks are perfect. After clock-tree synthesis and place-and-route are perfor... » read more

Achieve 10X Faster CDC Debug Leveraging Machine Learning
By Synopsys - 25 Jan, 2023 - Comments: 0

Over the years, system-on-chip (SoC) design sizes have crossed the billion-gate mark. Higher complexity has been introduced within semiconductor designs to deliver desired functionality. The number of asynchronous clock and reset domains is growing heavily within these complex SoCs, leading to millions of clock domain crossing (CDC) violations at the SoC level. Each of these violations ... » read more

Raising IP Integration Up A Level
By Brian Bailey - 27 Oct, 2022 - Comments: 0

An increase in the number and complexity of IP blocks, coupled with changing architectures and design concerns, are driving up the need for new tools that can enable, automate, and optimize integration in advanced chips and packages. Power, security, verification and a host of other issues are cross-cutting concerns, and they make pure hierarchical approaches difficult. Adding to future comp... » read more

Formal Verification Ensures The Perseverance Rover Lands Safely On Mars
By Joseph Hupcey III - 28 Apr, 2022 - Comments: 0

By Joe Hupcey III and Kevin Campbell Safely landing a spacecraft anywhere on Mars is a complex, high-risk challenge. Even worse, the most scientifically interesting areas of the planet are guarded by boulders, ditches, and tall cliffs — land formations that aren’t very welcoming to vehicles. Such was the case with the Mars Perseverance Rover's Landing Site: Jezero Crater. It’s not an e... » read more

Clocks Getting Skewed Up
By Brian Bailey - 30 Mar, 2022 - Comments: 0

At a logical level, synchronous designs are very simple and the clock just happens. But the clocking network is possibly the most complex in a chip, and it's fraught with the most problems at the physical level. To some, the clock is the AC power supply of the chip. To others, it is an analog network almost beyond analysis. Ironically, there are no languages to describe clocking, few tools t... » read more

Early Simulation Of Multi-Cycle Paths And False Paths
By Taruna Reddy - 24 Jun, 2021 - Comments: 0

Designing with synchronous clocks avoids metastability issues on clock domain crossings, but it presents its own challenges when multi-cycle and false paths are involved. A multi-cycle path (MCP) occurs when a logical function requires more than one clock cycle to produce a final, stable result. The designer must ensure that the destination register does not clock until the result is ready. Thi... » read more

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