可通过按键转换分别显示分、秒和小时、分。可通过键盘第一至第六个键分别使秒的低、高位置零，分钟的低、高位加一，小时的低、高位加一。由键盘第七个键使小时、分显示与分、秒显示互换。由键盘8显示闹钟时间，键盘第三至第六个键可调整闹钟时间，到时P3.0口闪烁20秒。-through conversion keys showed minutes and seconds and hours,. By the keyboard first to the sixth Key seconds were so low, the position is high, low minutes, plus a high, low hours, a high increase. By the seventh-key keyboard so hours, and the show, the show swap seconds. 8 shows the keyboard by the time clock, keyboard third to the sixth Key adjustable clock time, and I am P3.0 scintillation 20 seconds.