yangsen 发表于 2016-6-12 17:58
S08没用过，不过我用STM8，efm32，stm32等单片机都是要设置成输出。设置成输入功耗很大 ...

AN4441提到了类似的观点：

Tips and tricks to consider when designing for low power:
• Set the pins to a known state. For this family of devices—Never leave floating pins. Floating pins affect the overall
power consumption

但并没有提及用哪个模式。