Browse Prior Art Database

Register File With System Logout

IP.com Disclosure Number: IPCOM000036397D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Brantley, WC Brodnax, TB Deitz, FS George, DA McAuliffe, KP Rathi, BD Storey, TM Widiger, DJ [+details]

Abstract

In many VLSI applications, there is a need for small local stores. However, previous designs of such storage units embedded in the logic of a chip typically suffer from chip testability difficulties and a lack of system logout capability. If the unit is designed as a small random-access memory (RAM), for instance, the logic must be specially configured to provide test access at neighboring shift register latches (SRLs) - at a design cost. Such designs are not capable of system logout. This disclosure describes a register file, which is in itself 100% level sensitive scan design (LSSD) compatible that also deploys the scan strings as tools to provide system logout and selective storage alteration. The Solution