Electrical computers and digital processing systems: memory – Address formation – Address mapping
Patent
1997-04-16
1999-08-31
Cabeca, John W.
Electrical computers and digital processing systems: memory
Address formation
Address mapping
711103, 711202, G06F 1202
Patent
active
059467142
ABSTRACT:
A semiconductor storage device connectable to a host information processing apparatus having a flash memory section that stores data in sectors and wherein the flash memory section includes an address management table that stores information about the relation between logical sector numbers for data management in a host information processing apparatus and physical sector numbers for data management in the flash memory section. The flash memory section also includes a table state map that stores information about the physical locations at which the sector number information in the address management tables is stored. The semiconductor storage device also includes a flash memory control circuit for controlling data write and data read processing for the flash memory section. The control circuit refers to the table state map when the host information processing apparatus requests data write or data read to identify the physical location at which the corresponding address relation information is stored and converts the logical sector number received from the host information processing apparatus into a physical sector number based on the value stored at the identified location in the address management tables.
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Cabeca John W.
Lee Felix B.
Mitsubishi Denki & Kabushiki Kaisha
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