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TSC2007: TSC2007上电存在小概率初始化失败

Part Number: TSC2007

主控芯片IMX6,通过IIC和TSC2007通讯,IIC总线上同事挂载RTC芯片,上电过程中,存在CPU发送指令,没有ack'回应,导致通讯失败,挂在同一个IIC总线上的RTC电路,未出现过通讯不上问题,上拉电阻1.5K,4.7K均有尝试,但仍然有可能通讯没有ack回应,是否该芯片本身就是有这样的问题,存在概率性不能通讯,请帮忙解答一下,谢谢