An accurate FPGA online delay monitor supporting all timing paths

Weixiong Jiang, Rui Li, Heng Yu, Yajun Ha

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Accurate circuit delay measurement is essential for various purposes such as aging detection, health monitoring, and dynamic voltage and frequency scaling. State-of-the-art measurement techniques exhibit several limitations. For example, they are insufficiently informative by only returning binary results on the status of the circuit being normal or abnormal. More importantly, current approaches are not applicable for measuring the delay of timing paths that end with DSPs and BRAMs. To address the issues, we propose a novel online delay monitor (ODM) for modern FPGA platforms that (1) accurately returns the numerical delay values, (2) and is compatible with all types of timing paths in FPGAs. Our proposed ODM is achieved by employing a shadow register triggered by the output signal of a combinational circuit to sample a phase shifting clock. Besides, our design is capable of conveniently measuring the clock jitters, so we are able to propose an associated jitter management scheme to ensure correct ODM sampling. Experimental results show that our ODM achieves an error within 2% with respect to the ground truth.

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728133201
Publication statusPublished - 2020
Event52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Virtual, Online
Duration: 10 Oct 202021 Oct 2020

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2020-October
ISSN (Print)0271-4310

Conference

Conference52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
CityVirtual, Online
Period10/10/2021/10/20

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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