tag: X propagation

Timing Closure At 7/5nm
By Ed Sperling - 17 Mar, 2020 - Comments: 2

Mansour Amirfathi, director of application engineering at Synopsys, examines how to determine if assumptions about design are correct, how many cycles are needed for a particular operation and why this is so complicated, and what happens if signals get out of phase. » read more

Three Steps To Complete Reset Behavior Verification
By Chris Kwok - 14 Nov, 2019 - Comments: 0

By Chris Kwok, Priya Viswanathan, and Ping Yeung Reset architectures are notoriously complex and difficult to verify. Today’s SoCs contain highly complex reset distributions and synchronization circuitry. Often, reset trees can be larger than clock trees and have many of the same potential issues. Verifying that a design can be correctly reset under all modes of operation presents signi... » read more

Addressing The Challenges Of Reset Verification In SoC Designs
By Mentor, a Siemens Business - 13 Nov, 2019 - Comments: 0

This paper presents commonly occurring challenges involved in reset tree verification and their solutions. We lay out a three part approach to build a complete solution that combines static analysis of the design structure, RTL simulation with X-propagation, and formal verification. The paper includes results from testing this solution on a customer design. To read more, click here. » read more

Efficient Low Power Verification & Debug Methodology Using Power-Aware Simulation
By Himanshu Bhatt - 13 Dec, 2018 - Comments: 1

By Himanshu Bhatt and Shreedhar Ramachandra Isolation, retention, and power switches are some of the important functionalities of power-aware designs that use some of the common low power techniques (e.g.) power shutoff, multi-voltage and advanced techniques (e.g.) DVFS, Low VDD standby, and biasing. The strategies for isolation, retention, and level shifter are specified in the power forma... » read more

Formal’s Roadmap
By Brian Bailey - 22 Nov, 2016 - Comments: 0

Formal verification has come a long way in the past five years as it focused on narrow tasks within the verification flow. Semiconductor Engineering sat down to discuss that progress, and the future of formal technologies, with [getperson id="11306" comment="Raik Brinkmann"], president and CEO of [getentity id="22395" e_name="OneSpin Solutions"]; Harry Foster, chief verification scientist at [g... » read more

Formal Analysis Of X Propagation
By OneSpin Solutions - 27 Jul, 2016 - Comments: 0

Verifying the absence of undefined signal values in a design is in general a hard problem. Formal 4-state logic analysis offers a powerful solution. This white paper discusses X-related verification issues, and how advanced 4-state formal analysis solves them. This white paper covers the 360 DV-Verify product. To read more, click here. » read more

The New Face Of Formal
By Brian Bailey - 29 Oct, 2015 - Comments: 0

Semiconductor Engineering sat down to discuss the recent growth in adoption of formal technologies and tools with Lawrence Loh, product engineering group director at [getentity id="22032" e_name="Cadence"], Praveen Tiwari, senior manager of R&D in the verification group at [getentity id="22035" e_name="Synopsys"], Harry Foster, chief scientist at [getentity id="22017" e_name="Mentor Graphic... » read more

Delicate Balance
By Joseph Hupcey III - 08 Aug, 2013 - Comments: 0

By Joe Hupcey III It’s not surprising that power optimization is a critical part of today’s complex designs. Unbeknownst to most consumers is an underlying methodology that every design engineer must follow to make sure a consumer device meets the power requirements of the consumer—even if the consumer doesn’t realize they’re demanding it. The situation in industrial products, suc... » read more

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