Two examples, the key modules ALU and serial communication port based on PIC17C42 MCU have been designed. The analysis of function and arithmetic has been researched and the relevant scheme has been designed.

• 以PIC17C42 MCU的关键模块ALU的设计和串行通信口的设计为实例,对这些模块进行了功能和算法上的分析,设计了相应的方案。