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BQ78350: 无法通讯

Part Number: BQ78350
Other Parts Discussed in Thread: BQ76930, EV2400

方案:BQ78350+BQ76930负极保护,

现象:用EV2400跟上位机无法通讯。

分析:电池组使用一段时间后,无法通讯,确认芯片未在ROM模式,强制进入上位机页面写程序,写入不了,更换芯片后,通讯恢复正常(无通讯的芯片拿去磨片,未发现有物理损坏)。是什么原因导致芯片通讯失效。