Integrated circuit with real time, elapsed time, and cycle count

Details Integrated circuit with real time, elapsed time, and cycle count Integrated circuit with real time, elapsed time, and cycle count

1994-06-14

1996-01-23

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting based on number of times machine or apparatus operates

377 44, 377 20, 377 32, 364185, 364187, G06M 302

Patent

active

054870968

ABSTRACT:
An integrated circuit which includes not only a real time clock, but also an elapsed time counter, and a third counter. The elapsed time counter measures the total number of seconds during which a system has been powered up. The third counter is a "cycle counter," which measures the number of times a power cycle (power-up and power-down) has occurred. Thus, by reading the cycle counter and the elapsed time indicator, the general power history of a system can readily be determined, even if the system itself has totally failed. This integrated circuit is battery backed, and is advantageously combined with a system for which power history must be maintained.

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