What is the role of formal verification in VLSI | Chipedge

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What is the Role of Formal Verification in VLSI?

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ASIC project life cycle stages like front-end verification, logic synthesis, post routing checks, and ECOs all employ formal verification. However, the formal verification in vlsi used to check RTLs is quite different from other types of formal verification. In contrast to dynamic verification methods like simulation, formal verification refers to a group of approaches that use static analysis based on mathematical transformations to ascertain if hardware or software behavior is valid.

The number of vectors required to exercise the verification of the system to an acceptable level of coverage has risen along with design sizes and simulation timeframes, therefore verification teams have explored ways to lower this number.

Formal verification in vlsi is a quick way to show that a given piece of logic satisfies a given set of properties under all circumstances without considering every conceivable state.

Users have been urged to embrace formal verification in vlsi is more concentrated methods due to security risks and communication problems (like stalemates in on-chip networks). For instance, formal verification techniques, like the security software developed by Jasper Design Automation, may check for logical sneak pathways that could compromise security more effectively than simulation. When focused formal verification is used, the vendor bundles a variety of mathematical procedures together with scripts specific to the situation at hand. 

Also Read: SV Verification Guide: The Ultimate Knowledge on SV Verification 


Starting with the RTL development stage, IP verification, and subsequently SoC integration, formal property checking can be applied. Formal verification doesn’t require a different testbench environment. In a later stage, verification engineers might also employ the same claims.

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