一种基于LPC21xx的PCF8563（I2C RTC）实时时钟程序序源码，按键与菜单方式驱动driver，可根据注释修改。 可直接使用。 -Based on the LPC21xx the PCF8563 (I2C RTC) sequence of real-time clock program source code, buttons and menus are driven driver, according to the annotation to be modified. Can