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Register File With System Logout Disclosure Number: IPCOM000036397D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-29

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


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