1． 利用单片机内部的T0，T1计时计数器产生中断，并通过单片机最小系统按键产生外部中断，利用单片机中断系统闹钟的走时，调整及报数功能。-1. The use of single-chip within the T0, T1 timing counters generate an interrupt, and the smallest single-chip systems have external interrupt button, using single-chip system cloc