单片机多功能数字钟设计原理，制作一个24小时制多功能数字钟。 2.要求 (1)具有时间设置(小时和分钟)、闹钟时间设置、闹钟开、闹钟关功能。-Single-chip multi-function digital clock design principles, to produce a 24-hour multi-function digital clock. 2. Requirements (1) with set-up time (hours and minutes), set the alarm time, alarm clock opening, alarm clock off feature.