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BQ40Z50-R2: SMBUS communication exception

Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: BQ40Z50

Tool/software:

Hi 

We have developed a laptop battery project using the bq40z50; During finished product testing, there are often errors in reading battery information, as shown in the following figure; Could you help me identify where the problem may be?

The system side is a hardware IIC host and a address 0x12 slave;

thanks