Title:
MULTIFUNCTIONAL ELECTRONIC TIMEPIECE
Document Type and Number:
Japanese Patent JPS5786078
Kind Code:
A
Abstract:
PURPOSE: To save the labor and time of multifunctional timepiece design by constituting a main IC and additive function IC of separate ICs.
CONSTITUTION: An IC21 constituting a main system including a clock circuit, a display driving circuit, an external operation input circuit, an option data input circuit, etc. and an IC27 constituting an option system are constituted in separate bodies. The display data of an option system 27 is transmitted 28 to a main system 21, and is displayed in the display device 22 of the system 21.
Inventors:
YAMAGUCHI SHIZUO
Application Number:
JP16156280A
Publication Date:
May 28, 1982
Filing Date:
November 17, 1980
Export Citation:
Assignee:
CITIZEN WATCH CO LTD
International Classes:
G04G99/00; (IPC1-7): G04G1/00