说明：  16字 LED点阵屏+DS1302电子钟 C 程序1 脚接+5V 2，3脚32768HZ晶振 4脚接地 5脚接S51的P02 6脚接S51的P01 7接S51的P008脚接后备电源，可以接老计算机主板板上的3.6V电池，也可以通过二级管隔离接一个大容量电解电容电压在2.5V以上即可维持595连级输出数据，138行驱动 P1_0为时钟模式转换键、P2_1为时钟加键、P1_2为时钟减键、P2_3为时钟复
(C program of the 16-character LED dot matrix display+DS1302 electronic clock pin+5V 2,3 feet 32768HZ crystal 4 foot ground five feet of the P01 to P02 6 pin access S51' s S51 then S51 P008 pin back-up power, you can access the old computer motherboard board 3.6V battery can also be connected through two tubes isolation can maintain a large-capacity electrolytic capacitor voltage of 2.5V above output data of the 595 company-sized, 138-line-driven P1_0 clock mode conversion key, P2_1 clock plus key , P1_2 clock minus key P2_3 complex as the clock)