ELECTRONIC CONTROL APPARATUS

• Main Authors: TSURUMI TAKASHI, RI KIZASHI, YAGI SATOSHI
• Format: Patent
• Language: English
• Published: 12.11.2012
• Subjects: ELECTRONIC TIME-PIECES; HOROLOGY; PHYSICS

PROBLEM TO BE SOLVED: To improve reliability of a time to be measured in a standby state.SOLUTION: An electronic control apparatus 10 which returns from a standby state to a temporary active state in the lapse of a predetermined period of time comprises a generation section 132 which generates a first clock having a first frequency in the temporary active state and a normal active state, a generation section 131 which generates a second clock having a second frequency in the normal active state and the standby state, a calibration section 231 which determines a calibration coefficient of the second clock based on the first clock at least either in the normal active state or in the temporary active state, a setting section 232 which increases the second frequency when the calibration coefficient is equal to or more than a first predetermined value, at least either in the normal active state or the temporary active state, and a measuring section 233 which measures the lapse of the predetermined period of time based on the calibration coefficient in accordance with the second clock in the standby state.