基于片内ADC 的多档位分辨方法及其在小型通信终端中的应用

小型通信终端往往采用低功耗小尺寸的微控制器，I/O 引脚资源有限，但仍然要面对大量I/O 端口的需要。利用AVR 单片机片内的一路ADC 以及相关的多档位开关的模糊判决法和算术平均滤波算法，实现多档位开关的档位分辨，可以在节省多个I/O 口资源的基础上简化接口电路设计。实践证明该方法具有较高工程实用价值。
关键词：ADC；多档位分辨；模糊判决；算术平均滤波
Multi-Switching Distinguish and Its Application in Small Communication Terminal Based on On-Chip ADC Yang fan, Zhao li (Guilin University of Electronic Technology, Guilin 541004, China) Abstract:A low power and small size microcontroller is needed in the small communication terminal, but its I/O ports is limited. A single ADC of AVR microcontroller is used in Multi-Switching distinguish. Based on this application methods of Fuzzy Decision and Arithmetic Average Filtering are presented, this topic has special important significance on saving the I/O ports and simplifying the circuit design. The result of a series of experiments shows that this technology has a high value on engineering.
Key words: ADC, Multi-Switching Distinguish, Fuzzy Decision, Arithmetic Average Filtering