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你好。请问无输出的时候
1:254的PIN36/37的管脚有无LOS信号输出?如有,则是输入端出现问题。
2:254的PIN32/3/4/5/7的设置是否是高?以免被错误关断。
3:254的PIN14的设置是否正确选择了信号输入端。