Horology: time measuring systems or devices – With memorandum holder or erasable writing surface
Patent
1991-11-26
1994-03-22
Roskoski, Bernard
Horology: time measuring systems or devices
With memorandum holder or erasable writing surface
371 66, 371 165, 36470507, 36470508, G04B 4500
Patent
active
052971198
ABSTRACT:
Data input through a key switch is displayed on a liquid crystal display and is stored in an EEPROM. The data stored in the EEPROM is immediately read out to check whether the read data coincide with the input data. If the data stored in the EEPROM and read out therefrom does not coincide with the input data, the input data is stored again. If the input data cannot be stored in the EEPROM after storage operation is performed a predetermined number of times, a CPU determines, on the basis of a signal from a battery voltage detecting circuit, whether a voltage applied from a power supply circuit to the EEPROM exceeds a predetermined voltage. On the basis of this determination result, the CPU causes the liquid crystal display to display a cause for the disabled storage operation with respect to the EEPROM.
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Patent Abstracts of Japan, vol. 14, No. 474, Oct. 16, 1990 and JP-A-21 90 715 (Tokico), Jul. 26, 1990.
Patent Abstracts of Japan, vol. 15, No. 37, Jan. 29, 1991 and JP-A-22 75 506 (Amada Metrex Co), Nov. 9, 1990.
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Tonegawa Nobuyuki
Yamaguchi Syuji
Casio Computer Co. Ltd.
Roskoski Bernard
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