Method for saving data in the event of unwanted interruptions in

Details Method for saving data in the event of unwanted interruptions in Method for saving data in the event of unwanted interruptions in

1999-04-29

2000-09-05

Le, Vu A.

Static information storage and retrieval

Powering

Data preservation

36518533, G11C 700

Patent

active

061153133

ABSTRACT:
A method for saving and restoring data in the event of unwanted interruption of programming, the control logic unit of the memory controls writing of the data that would otherwise be lost and its address, in an appropriate backup memory location. To this end, the backup memory location is maintained erased, such as to allow immediate writing of the data and its address, in case of interruption of programming. To guarantee functioning even in the absence of an external supply, appropriate charge accumulators are provided, which can guarantee availability of a write-only cycle. As soon as a voltage drop is detected, the operations in progress are interrupted, and the backup operations for the data being programmed are activated; when the memory is switched on again, it is verified whether an interruption of the writing cycle has previously occurred, and thus the data saved can be recovered into the main memory.

REFERENCES:
patent: 4800533 (1989-01-01), Arakawa
patent: 5414671 (1995-05-01), Fukumoto

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