Memory controller, flash memory system, and method for...

Details Memory controller, flash memory system, and method for... Memory controller, flash memory system, and method for...

2008-01-01

2008-01-01

Peikari, B. James (Department: 2189)

Data processing: database and file management or data structures

Database design

Data structure types

C711S103000, C711S159000, C717S170000

Reexamination Certificate

active

11023746

ABSTRACT:
There is disclosed a controller included in a flash memory system attachable to a memory interface of a host system. If a block in which new data is written and a block in which old data is written are present simultaneously, the controller determines in which block the newest data is written, based on version identifier stored in a redundant area of a flash memory. Specifically, the controller has an access control function for controlling access to the flash memory, an address managing function for managing correspondence between a logical block address supplied from the host system and a physical block address in the flash memory, a version identifier setting function for writing version identifier in the redundant area of the flash memory, and a version identifying function for identifying a block in which newest data corresponding to a same logical block address is written based on the version identifier.

REFERENCES:
patent: 5535369 (1996-07-01), Wells et al.
patent: 6076137 (2000-06-01), Asnaashari
patent: 6115785 (2000-09-01), Estakhri et al.
patent: 6145051 (2000-11-01), Estakhri et al.
patent: 6763424 (2004-07-01), Conley
patent: 2002/0188814 (2002-12-01), Saito et al.

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