P0_2脚接了开关,断开下悬空,开关按下后接地。现在设置P0_2上拉输入,开关触发一次后后发现P0_2值始终为0,芯片复位P0_2也为0,测量P0_2端电压为1.1V,必须要芯片彻底断电P0_2才能恢复正常。 同样测试P0_3引脚正常,只是什么问题?
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P0_2脚接了开关,断开下悬空,开关按下后接地。现在设置P0_2上拉输入,开关触发一次后后发现P0_2值始终为0,芯片复位P0_2也为0,测量P0_2端电压为1.1V,必须要芯片彻底断电P0_2才能恢复正常。 同样测试P0_3引脚正常,只是什么问题?