I2C总线驱动、实时钟芯片PCF8563应用程序CPU :PIC16F877A Function :以I2C总线方式向PCF8563芯片写入初值，以BCD码方式存储，以字符方式串口显示 。调试通过。-I2C-bus driver, real-time clock chip PCF8563 Application CPU: PIC16F877A Function: to I2C-bus PCF8563 chip manner to write the initial value to BCD