Semiconductor memory device

Registers – Records – Conductive

Reexamination Certificate

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Details

C365S222000, C365S226000, C365S230010, C365S230010

Reexamination Certificate

active

07000846

ABSTRACT:
A semiconductor memory device including a flash memory and a RAM incorporating a pseudo-SRAM contained in an MCP, has an internal transfer control signal for controlling internal data transfer between the flash memory and pseudo-SRAM, and an external transfer control signal for controlling data transfer between an external CPU and pseudo-SRAM, as control signals for the pseudo-SRAM. A flash controller in the RAM controls the internal transfer control signal so as to suspend the internal data transfer between the flash memory and pseudo-SRAM when the external CPU requests access to the pseudo-SRAM during the internal data transfer.

REFERENCES:
patent: 4992651 (1991-02-01), Takahira
patent: 6515929 (2003-02-01), Ting et al.
patent: 6523755 (2003-02-01), Shinohara
patent: 2003/0156489 (2003-08-01), Takeuchi et al.
patent: 632463 (1995-01-01), None
patent: 2002-312232 (2002-10-01), None

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