Horology: time measuring systems or devices – Chronological – With pulse transforming means
Patent
1989-04-05
1993-03-16
Miska, Vit W.
Horology: time measuring systems or devices
Chronological
With pulse transforming means
368157, 368201, G04C 1900, G04F 500, G04B 1800
Patent
active
051950634
ABSTRACT:
An integrated circuit for an electronic timepiece includes at least one semiconductor nonvolatile memory device. Reference data can be checked across a pair of output terminals prior to being stored in at least one EPROM to check the accuracy and acceptability of the reference data for driving a motor of the timepiece. The reference data once written into the EPROM serves as control data. Both the reference data and control data are used for controlling at least one function of the timepiece. The control data also can be checked across the output terminals to determine its accuracy and acceptability for driving the motor. Testing of the reference data and control data can be performed on a faster than real time basis.
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B. Gerber "A 1.5 V Only CMOS EEPROM Based on Fowler & Nordheim Emission Design, Technology and Applications", International Congress of Chronometry Proceedings, Oct. 1984.
Birkner, "New PROM Architecture Simplifies Microprogramming", IEE Electro, vol. 8, 1983.
Kaplan Blum
Miska Vit W.
Seiko Epson Corporation
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