Title:
【発明の名称】モジュール型キャッシュメモリバッテリバックアップシステム
Document Type and Number:
Japanese Patent JPH11505659
Kind Code:
A
Abstract:
A method and apparatus providing a battery backup for a dynamic random access memory (DRAM) cache system that senses the Vcc level supplied through the cache controller to the cache memory and, if Vcc falls below a preset threshold level, the battery backup apparatus switches the cache memory array to a backup battery Vcc source, and a backup refresh control generator unit that is also powered by the backup battery Vcc source. The cache DRAM, backup battery, and backup refresh generator are physically contained in a single module that can be disconnected from the cache controller and host computer system while preserving the cache memory contents. The backup system is installed in an operating host system for recovery of the cache memory contents and/or resumption of execution of the program that was running when the Vcc power failure occurred.
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Inventors:
Lion, thomas shinkiat
Rao, Krishnakhmer
Gupta, Palbean Khmer
Rao, Krishnakhmer
Gupta, Palbean Khmer
Application Number:
JP53199797A
Publication Date:
May 21, 1999
Filing Date:
March 07, 1997
Export Citation:
Assignee:
Myrex Corporation
International Classes:
G06F1/26; G06F1/30; G06F11/20; G06F12/16; G11C5/14; G06F12/08; G11C11/401; H02J9/00; (IPC1-7): G11C11/401; G06F1/26; G06F12/08; G06F12/16; H02J9/00
Attorney, Agent or Firm:
Kazuo Kobashi (1 person outside)