I would like to read the unique device ID to check whether the product is good or not.Do you have a unique number?Please tell us.
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There is a 96-bit unique ID register you can read which will be unique for each chip.
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I wonder if there are some fixed values in the unique device id register.
Yes. Not all 96 bits are unique. Read a few chips to see if that is a concern for your needs.
But how will you determine if any ID value indicates good or bad ?