Importance

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Abstract

A semiconductor storage device such as a disk pack includes a plurality of flash memories, a write buffer memory in which data are temporarily held, a processor which controls data writing and erasing operations and which transfers and analyzes commands and statuses to and from the flash memories, and a circuit which generates a writing supply voltage Vpp for the flash memories. The semiconductor disk pack may be connected, for example, to a standard bus in a personal computer. The processor operates to send a first instruction for writing or erasing data of one word into a first one of the flash memories, and it continuously writes the data of one word into an accessible one of the other flash memories before the first one of the flash memories becomes capable of accepting the next write or erase instruction. The semiconductor storage device further includes a static random access memory for storing a conversion table for converting logical sector numbers into physical sector numbers for those areas of the flash memories which have accepted the write and erase instructions.

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First Claim