Circuits for and methods of determining a period of time...

Details Circuits for and methods of determining a period of time... Circuits for and methods of determining a period of time...

2009-03-11

2010-12-14

Mai, Son L (Department: 2827)

Static information storage and retrieval

Powering

Data preservation

C365S201000, C365S226000, C714S718000, C714S719000

Reexamination Certificate

active

07852701

ABSTRACT:
A circuit structure for determining a period of time during which a device was without power is disclosed. The circuit structure comprises a volatile memory storing known data and a test circuit coupled to the volatile memory, the test circuit determining an amount of incorrect data stored in the volatile memory after a period of time during which the device was without power. The amount of incorrect data is used to determine the period of time during which the device was without power. A method of controlling a device based on the amount of incorrect data stored in a volatile memory after the device was without power is also disclosed. For example, the device can be controlled by altering a start-up sequence of one or more elements of the device.

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