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项目马上就要交期了，居然卡在了这里。。。求大神解答，，，
http://www.ti.com/lit/ds/slusbg0c/slusbg0c.pdf
拔下电池，插入充电器时，PG引脚的状态灯一直闪烁。但是根据datasheet描述，PG引脚在插入有效充电器时会是低电平。在插入电源无效或未插入时为高阻态。
接上电池，插入充电器时，两个指示灯都不亮
