MP2651 return no ACK at the first IIC contact since power up

Battery Management
1

Some of our devices fail to respond to the first IIC communication when powered on, I’ve checked the battery voltage and pull up voltage are proper. While using the logic analyzer to analyze the SDA data, MP2651 always returns no ack while configuring IIC address. Then we use MPS EVKT USBI2C to connect to the computer still on our device, the communication is normal and registers of MPS2651 can be updated and read. Besides, when i cut off the battery voltage of our device

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, IIC communication gets to normal. What’s wrong with my device IIC communication?

2

New update
When i use MPS EVKT USBI2C to communicate with the computer of our device, the IIC address is 0X0C and IIC communication is normal. while the first IIC contact since power up, the IIC address is 0X08 and IIC communication fails. ADDR Pin is connected to 0Ω, which represents the IIC address should be 0X08. So why is there 0X0C IIC address?