Circuit for prevention of unintentional writing to a memory,...

Details Circuit for prevention of unintentional writing to a memory,... Circuit for prevention of unintentional writing to a memory,...

2007-05-01

2007-05-01

Elmore, Stephen C. (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S100000, C711S154000, C711S156000, C711S166000, C710S200000, C713S340000, C714S022000, C714S047300

Reexamination Certificate

active

10809866

ABSTRACT:
A circuit for prevention of unintentional writing to a memory prevents unintentional writing to a nonvolatile memory, after a recovery from a transitory power failure. The circuit includes a low-voltage detection circuit for detecting a power supply voltage drop depending on the state of a control signal for the detection circuit. A writing operation to the memory is prohibited depending on the control signal as well as upon an output signal of the low-voltage detection circuit.

REFERENCES:
patent: 6119210 (2000-09-01), Leon et al.
patent: 6201731 (2001-03-01), Kamp et al.
patent: 6556504 (2003-04-01), Kwon et al.
patent: 6788567 (2004-09-01), Fujimori
patent: 2002/0103958 (2002-08-01), Kuwano
patent: 2002/0129195 (2002-09-01), Hongo et al.
patent: 08-095865 (1996-04-01), None
patent: 2002-366436 (2002-12-01), None

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