Play Webinar

Title: Design Constraints for CDC Verification: Bridging Timing, Clocks, and Reliable Synchronization

Description:

Design constraints are a fundamental part of FPGA implementation because they define how a design must operate in the real physical environment - not just logically. While RTL describes the functional behavior of a design, constraints specify timing requirements, clock definitions, and interface conditions that guide FPGA tools during synthesis, placement, routing, and timing verification.

FPGA implementation tools rely on Static Timing Analysis (STA) to ensure that the design meets its timing requirements, such as clock frequency, input/output delays, and timing relationships between signals. These requirements are defined using design constraints, typically written in SDC-based formats supported by FPGA vendors.

Although Clock Domain Crossing (CDC) analysis is a design verification task rather than part of the implementation flow, it also relies on design constraints. A CDC tool must understand which clocks are related, which are independent, and how clocks interact across the design to correctly identify real synchronization risks while avoiding false violations from intentional crossings. Additionally, information about clock phases, resets, and other CDC-related structures is essential for accurate analysis.

To support this process, ALINT-PRO extends the SDC language with CDC-specific constraints that help describe clock relationships, reset structures, and other design properties relevant to CDC verification.

In this webinar, we will provide a practical overview of design constraints in FPGA designs and explain how they are used in CDC verification. We will also introduce CDC-specific constraint extensions and demonstrate Multi-mode CDC Analysis with ALINT-PRO, enabling more accurate and scalable CDC verification for complex FPGA designs.

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