Flash memory access apparatus and method

Details Flash memory access apparatus and method Flash memory access apparatus and method

2004-03-17

2010-02-16

Chace, Christian P (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S159000

Reexamination Certificate

active

07664906

ABSTRACT:
A flash memory access apparatus and method improves the overall performance of a flash memory system by minimizing the deterioration of performance of a flash memory due to repeated write operations through a minimized process of a write operation and the process of a recovery operation in consideration thereof and by allowing a stable recovery even though an error occurs. The flash memory access apparatus comprises a flash memory with regions divided on the basis of a unit that consists of predetermined blocks; and a flash memory controller. When a write operation is requested for a specific logical block number of the flash memory, the flash memory controller writes data and meta-information in a physical block corresponding to a logical block with the logical block number in the absence of a previous write operation for the logical block, but performs a write operation for writing the data and the meta-information allocated to the logical block in a new physical block without changing flash memory state information written in a previous physical block corresponding to the logical block in case of the presence of the previous write operation.

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How Flash Memory Works, How Stuff Works [online], [retrieved on Jun. 8, 2009], Retreived from the Internet (URL: http://electronics.howstuffworks.com/flash-memory1.htm>, pp. 1-3.

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