Document Type and Number:
Japanese Patent JPS6261913
Kind Code:
B2
Abstract:
PURPOSE:To perform selection of functions including snooze function easily and surely with one terminal by performing snooze operation via a snooze storage circuit as well during the alarm function out of the 3 functions selected by three values detection outputs. CONSTITUTION:High, low, intermediate level input ALIN are detected, and the outputs ALM, ALH of a 3 values detection circuit 5 are changed, by which an ordinary timepiece function, a test function and an alarm function are selected, and at the alarm function, the outputs ALH, ALM go respectively to low and high levels. A snooze storage circuit 8 is set via a chopping circuit 7 by the output ALH, and an NAND gate 37 is turned on by an NOR gate 34 and NAND 35, whereby an alarm state is attained. When the input ALIN is changed to low, high, low levels in this state, the circuit 8 is reset after a prescribed time by the output of the 3rd frequency dividing circuit 4 for counting snooze time, after which it is again set and the snooze operation is accomplished, thus the selection of the functions including the snooze function is accomplished easily and surely with one terminal.
Inventors:
OKUYAMA YASUHIKO
Application Number:
JP18093380A
Publication Date:
December 23, 1987
Filing Date:
December 19, 1980
Export Citation:
Assignee:
SANYO ELECTRIC CO
International Classes:
G04G13/00; G01R31/28; G04C21/16; G04D7/00; G04G13/02; G04G99/00; H03K23/66
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