Semiconductor memory device having non-volatile and volatile mem

Details Semiconductor memory device having non-volatile and volatile mem Semiconductor memory device having non-volatile and volatile mem

1991-07-19

1993-09-28

Sikes, William L.

Static information storage and retrieval

Powering

Data preservation

365201, G11C 800

Patent

active

052491560

ABSTRACT:
A semiconductor memory device includes a memory cell array including a plurality of memory cell parts which are arranged in an array, where each of the memory cell parts are made up of an electrically erasable programmable non-volatile memory cell and a volatile random access memory cell, a mode selection circuit for transferring data stored in the volatile random access memory cell into the electrically erasable programmable non-volatile memory cell for each of the memory cell parts in response to a store signal which specifies a store mode in which the data are stored in the electrically erasable programmable non-volatile memory cell of each of the memory cell parts, and a memory part for storing at least predetermined bits of the external memory address in response to the store signal.

REFERENCES:
patent: 4538246 (1985-08-01), Wang et al.
patent: 4651307 (1987-03-01), Toumayan et al.
patent: 4763333 (1988-08-01), Byrd
patent: 5113371 (1992-05-01), Hamada

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