一种低成本的利用单片机多余I／O口实现的温度检测电路，该电路非常简单，且易于实现，并且适用于几乎所有类型的单片机。-The use of a low-cost single-chip redundant I/O port to achieve the temperature detection circuit, the circuit is very simple and easy to implement and is applicable to almost all types of mic