Patent ID: 8458506
Filing Date: 2013-06-04
Classification: G06F,G07C

Abstract:
1. A real time clock for outputting data indicating a time-of-day, comprising: an event detection circuit that is configured to detect an event detection signal; a timing circuit that is configured to generate the time-of-day data according to a signal outputted from an oscillator circuit; a memory; and a control circuit that is configured to record event data in the memory regardless of whether a reduction in an applied voltage has been detected, if the event detection circuit detects input of the event detection signal, wherein the event data includes additional data indicating an operating state of the real time clock and the time-of-day data generated by the timing circuit, and the control circuit uses the determination of whether the reduction in the applied voltage has been detected to then determine a correctness of the determination of whether the occurrence of the event has been detected.