说明：  很适合飞思卡尔单片机的初学者用来入门学习，全文通俗易懂，如果有51的经验，学起来会容易很多！！！………………
(It is very suitable for the beginners of Freescale MCU to use for introductory learning. The full text is easy to understand. If you have 51 experience, it will be much easier to learn!!!......)