Questa X-Check

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Overview

Questa X-Check

An undefined signal at a critical control junction in a design, or a register unexpectedly loaded with garbage, can quickly cascade into a perplexing, show-stopping bug. Unfortunately, the handling ‘X’ level signals differ in logic synthesis and simulation.


Get in touch with our sales team 1-800-547-3000

Screenshot of Questa GUI | The automated Questa X-Check app analyses your RTL design, then uses formal engines to exhaustively identify ‘X’ propagation issues in your RTL.

Questa Property Check Resources

Key Features

The Solution: Questa Automated X-State Verification

The automated Questa X-Check app is designed to automatically employ formal analysis to exhaustively identify ‘X’ propagation issues in your design. Specifically, taking your RTL and a spec of your initialization sequence as input Questa X-Check begins.

X-State Verification

Rapidly Identify Chip-Killing X-State Issues

An undefined signal at a critical control junction in a design, or a register unexpectedly loaded with garbage, can quickly cascade into a perplexing, show-stopping bug. Unfortunately, the handling ‘X’ level signals differ in logic synthesis and simulation. In the former case, ‘X’ is treated as a “don’t care”; the latter ‘X’ is treated as an “unknown”.

image displaying corrupted registers | Questa X-Check can rapidly identify chip-killing X-state issues

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