Semiconductor device

Static information storage and retrieval – Read/write circuit – Data transfer circuit

Reexamination Certificate

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Details

C365S189200, C365S185110, C365S185330, C365S230010

Reexamination Certificate

active

07830730

ABSTRACT:
A memory module fast in random accesses, large in capacity, and low in fabricating cost. And the memory module can assure high security. The memory module consists of a flash memory, a dynamic random access memory, and a control circuit. The control circuit enables data transfer between the flash memory and the dynamic random access memory only with a read operation for a specific address in the memory module. When reading data from the memory module, the control circuit refreshes the dynamic random access memory. Thus the present invention can realize a large capacity and low cost memory module capable of reading data fast reading and assuring high security.

REFERENCES:
patent: 6587393 (2003-07-01), Ayukawa et al.
patent: 7373452 (2008-05-01), Suh
patent: 7525855 (2009-04-01), Kagan
patent: 7613880 (2009-11-01), Miura et al.
patent: 2002/0185337 (2002-12-01), Miura et al.
patent: 2003/0028733 (2003-02-01), Tsunoda et al.
patent: 2006/0041711 (2006-02-01), Miura et al.
patent: 2002-366429 (2002-12-01), None
patent: 2003-91463 (2003-03-01), None

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