Memory controller for nonvolatile RAM operation, systems and met

Details Memory controller for nonvolatile RAM operation, systems and met Memory controller for nonvolatile RAM operation, systems and met

1991-06-11

1994-05-24

Mullins, James B.

Static information storage and retrieval

Read/write circuit

Including reference or bias voltage generator

365229, 365195, G11C 700

Patent

active

053155491

ABSTRACT:
A memory controller for supplying backup battery power when a main power supply voltage drops together with programmable plus power fail write protection. The controller includes supravoltage induced sleep mode operation, MOS switching between backup batteries during backup operation based on battery voltage levels and discharge circuitry for battery disposal.

REFERENCES:
patent: 4451742 (1984-05-01), Aswell
patent: 4492876 (1985-01-01), Colbert et al.
patent: 4730121 (1988-03-01), Lee et al.
patent: 4992983 (1991-02-01), Suzuki
patent: 5124946 (1992-06-01), Takahashi

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