The University of Southampton
University of Southampton Institutional Repository

Scan architecture with mutually exclusive scan segment activation for shift and capture power reduction

Rosinger, Paul, Al-Hashimi, Bashir and Nicolici, Nicola (2004) Scan architecture with mutually exclusive scan segment activation for shift and capture power reduction IEEE Transactions on Computer Aided Design, 23, (7), pp. 1142-1153.

Record type: Article


Power dissipation during scan testing is becoming an important concern as design sizes and gate densities increase. While several approaches have been recently proposed for reducing power dissipation during the shift cycle (minimum transition don't care fill, special scan cells and scan chain partitioning), very little work has been carried out towards reducing the peak power during test response capture and the few existing approaches for reducing capture power rely on complex ATPG algorithms. This paper proposes a scan architecture with mutually exclusive scan segment activation which overcomes the shortcomings of previous approaches. The proposed architecture achieves both shift and capture power reduction with no impact on the performance of the design, and with minimal impact on area and testing time (typically 2-3%). An algorithmic procedure for assigning flip-flips to scan segments enables reuse of test patterns generated by standard ATPG tools. An implementation of the proposed method had been integrated into an automated design flow using commercial synthesis and simulation tools which was used on a wide range of benchmark designs. Reductions up to 57% in average power, and up to 44% and 34% in peak power dissipation during shift and capture cycles, respectively, were obtained when using two scan segments. Increasing the number of scan segments to six leads to reductions of 96% and 80% in average power and respectively maximum number of simultaneous transitions.

PDF TCAD2004.pdf - Other
Download (663kB)

More information

Published date: July 2004
Organisations: Electronic & Software Systems


Local EPrints ID: 258752
PURE UUID: 4bc72faf-d7f5-48ca-ab9f-15e8a1566abb

Catalogue record

Date deposited: 12 Nov 2004
Last modified: 18 Jul 2017 09:30

Export record


Author: Paul Rosinger
Author: Nicola Nicolici

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.