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Digital display modes change sequentially: TIME/CALENDAR, STOPWATCH, TIMER, REGULAR ALARM.
Press in TIME/CALENDAR mode to access SINGLE-TIME ALARM mode.
Set digital time and calendar by pressing buttons A, C, and D to navigate and adjust digits.
Adjust timer duration by selecting and setting hour/minute digits using buttons A, C, and D.
Set the single-time alarm by navigating to the mode and adjusting the alarm time.
Procedure to reset the IC after battery replacement or to correct abnormal display.