一本中文的Cx51系列单片机的快速查询手册，是对传统和扩展的8051 微处理器的优化的C 编译器和库参考。中文的手册目前国内是比较难找的好材料。-Cx51 a series of single-chip Chinese fast query manuals, and expansion of traditional microprocessor 8051 optimized C compiler and library reference. Handbook of Chinese domestic is more difficult to find good material.