Device for the protection of stored data using a time delay circ

Details Device for the protection of stored data using a time delay circ Device for the protection of stored data using a time delay circ

1997-08-21

2000-09-12

Nguyen, Hiep T.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

711103, 711167, 713200, 713202, 713502, G06F 1214

Patent

active

061192104

ABSTRACT:
Disclosed is a device for protection of stored data comprising protection means to control a signal to enable the programming of a memory, the programming being permitted when the enabling signal is in a first state and prohibited when the enabling signal is in a second state, the protection means including a supply voltage drop detection device to set the enabling signal in the second state when the supply voltage is below a threshold, said device further comprising a time delay circuit capable of setting the enabling signal in the second state during a given period when a control signal goes into a first state.

REFERENCES:
patent: 4485456 (1984-11-01), Toyoda
patent: 4580246 (1986-04-01), Sibigtroth
patent: 4791614 (1988-12-01), Arakawa
patent: 5315549 (1994-05-01), Scherpenberg et al.
patent: 5343085 (1994-08-01), Fujimoro et al.
patent: 5430882 (1995-07-01), Tilghman et al.
patent: 5557576 (1996-09-01), Roohparvar et al.
patent: 5577195 (1996-11-01), Gochi
patent: 5644538 (1997-07-01), Merritt
patent: 5668760 (1997-09-01), Hazen
patent: 5787040 (1998-07-01), Leon et al.
French Search Report from French Patent Application 96 10589, filed Aug. 28, 1996.

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