DS12887芯片可以实现实时时钟显示，内部自带蓄电池可保存时间100年左右，配合1602设计的时钟小项目，带有闹钟功能，另外还附赠proteus仿真。(The DS12887 chip can realize real-time clock display, and the internal storage battery can be stored for 100 years or so, with the 1602 design of the clock small project, wi