在嵌入式设计过程中，要涉及到实时时钟的设计，本资料提供一个对实时时钟的非常详细的讲解，为你的实时时钟的设计提供帮助。

-In the embedded design process, it is necessary to relate to the design of real-time clock, the data provide a real-time clock on the very detailed, real-time clock for your design to help.