针对天嵌公司的2440开发板的使用说明，里面的讲解非常详细，通俗易懂，可以很好地帮助初学者上手。里面包括了程序如何烧写，怎么实现如图片切换，蜂鸣器，闹钟等具体的应用。-this PDF is an introduction for TQ2440, which explains in details, easy to understand, can be a good help beginners get started. it includes the program how to download, how to achieve specific applications such as picture switch, buzzer, alarm clock and so on.