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BQ2018: BQ2018与产品通讯失败

Part Number: BQ2018

您好!我们的产品使用BQ2018做电量计,在与客户产品结合使用时发现有较多通讯失败的不良现象。测试VCC电压只用3.3V-3.45V左右。请问通讯不良是由于电压达不到3.7V吗?请问可以用什么做软件可以测试芯片的通讯功能?电路图如下。谢谢!