| 摘要 |
PURPOSE:To prevent false setting in the case when modifying months and dates, by interrupting display when months and dates, which do not exist, are detected when correcting the months and dates. CONSTITUTION:Modes are changed over and a counter is compensated by means of key input and a control circuit 11. Dating is corrected regradless of a month counter 7 up to 31th from 1th when the month counter 7 is in months with thirty or less days or February. Thus, a month and date, which do not exist, detecting circuit 12 is mounted because there are dangers that months and dates which do not exist, such as, the 30th of February and the 31th of April are set when modifying months and dates, these months and dates, which do not exist, are detected, a display drive circuit 9 is controlled by the output, a display device 10 is flashed and the warnings of the necessity of the correction of the months and dates, which do not exist, are issued. |
