| 摘要 |
PURPOSE:To enable confirmation of timer circuit in a digital watch having a timer circuit by releasing the carry output inhibiting means from present time correcting hour and minute signal generating counters during the operation of the timer circuit. CONSTITUTION:Since the timer operation detection signal T0 is ''1'' during the operation of a timer circuit 22, an AND gate 26 is opened to become to supply carry output Mc from a minute signal generating counter 8 through the AND gate 26 and an OR gate 13 to an hour signal generating counter 9. When a present time correcting mode switch SW1 is closed, a minute correction signal Min of 0.5Hz is supplied through the OR gate 11 to the minute signal generating counter 8. When a carry output Mc is outputted, it is supplied to the hour signal generating counter 9, and when it passes a timer time, the output from the timer circuit 22 is stopped. |
