INFORMATION PROCESSING DEVICE, TIME-OF-DAY INFORMATION CONTROL METHOD

PROBLEM TO BE SOLVED: To achieve low power consumption and to make processing concerning time-of-day executable without leading to performance degradation. SOLUTION: A CPU 10 incorporates an internal RTC 10a for generating time-of-day information. Besides, an external RTC 14 is provided outside the...

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Bibliographic Details
Main Author OKUMURA TAKESHI
Format Patent
LanguageEnglish
Published 26.09.2003
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRONIC TIME-PIECES
HOROLOGY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To achieve low power consumption and to make processing concerning time-of-day executable without leading to performance degradation. SOLUTION: A CPU 10 incorporates an internal RTC 10a for generating time-of-day information. Besides, an external RTC 14 is provided outside the CPU 10. The external RTC 14 is supplied with power from a power source 18 even while power supply to the CPU 10 is halted, and the time-of-day information is backed up continuously. The CPU 10, if it is started up from a state in which the power is not backed up, reads out the time-of-day information from the external RTC 14 to set it in the internal RTC 10a, and thereafter uses the time-of-day information generated with the internal RTC 10a to execute the processing concerning the time-of-day. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020072801