结合单片机的结构和产品设计经验，介绍几种代码优化的方法。特别是ＯＯＴ技术和用ＲＡＭ构造间接寻址方式，省下可观的代码空间，为产品增加许多功能，大大地提高产品的竞争力。 Combined with the structure of the microcontroller and product design experience, introduced several methods of code optimization. In particular, OOT technology and RAM construction indirect addressing mode, saving considerable code space for the product to add many features, greatly enhance the competitiveness of their products.