Semiconductor storage apparatus

Details Semiconductor storage apparatus Semiconductor storage apparatus

1993-07-08

1995-05-02

Popek, Joseph A.

Static information storage and retrieval

Powering

Data preservation

371 402, 371 66, G11C 1400

Patent

active

054126126

ABSTRACT:
A semiconductor storage apparatus is provided which can be used as a primary storage apparatus and a secondary storage apparatus and which allows both high accessibility and non-volatile storage of information. A volatile RAM section is a semiconductor memory adapted to load information to be stored and can be accessed at a high speed from the outside by way of a central control section. A non-volatile RAM section is another semiconductor memory into which information can be electrically reloaded and which does not require a power supply for holding stored contents. Under the control of a save/reload control section of the central control section, a memory mutual access control section is activated and saving/reloading of stored information is performed between the volatile RAM section and the non-volatile RAM section by a volatile RAM access control section and a non-volatile RAM access control section.

REFERENCES:
patent: 4686652 (1987-08-01), Spence
patent: 4800533 (1989-01-01), Arakawa
patent: 4965828 (1990-10-01), Ergott, Jr. et al.
patent: 5058074 (1991-10-01), Sakamoto
patent: 5109505 (1992-04-01), Kihara
patent: 5197026 (1993-03-01), Butler

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