| 摘要 |
PURPOSE:To make the content display of presently selected additional function easily readable, by displaying the functional contents of a stopwatch and a timer by a main display means when the additional functions of both of them are selected while displaying present time by a sub-display means. CONSTITUTION:In an initial state, a switch 56 is opened and the output of a gate 33 is held to 0 while a frequency divider 2 is operated and a counter 4 counts time. The output of a gate 38 is to 0 and the output of the counter 4 is displayed by a main display means 13 through a selector circuit 9 and a decoder 11. When operation as a stopwatch is performed, the contact (d) of a switch is selected to set FF18 and an incremental/decremental counter 5 is held to an incremental state by the output of a gate 25. The outputs of gates 29, 38 are reversed to 1. The content of the counter 5 is displayed by the main display means 13 through a latch circuit 8 and the selector circuit 9. The decoder 12 receives the output of a counter 4 from a selector circuit 10 and said output is displayed by a sub-display means 14. |
