\"Chip factory serial number\" refers to a number consisting of a group of letters and numbers containing the chip type, and its naming rules are determined by each manufacturer.
According to some manufacturer feedback, in addition to the market open type number, the manufacturer will also according to the manufacturer feedback, in addition to the market open type number, the manufacturer will also generate the corresponding internal factory number according to the internal naming rules.
Therefore, the \"chip factory serial number\" and the \"model\" are not the same concept, that is, the \"model\" is the market model, and the \"chip factory serial number\" is the internal factory number.
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Chip serial number is the chip manufacturer in the production of a series of serial number code, the enterprise in the declaration to the customs, in the declaration element \"chip factory serial number\" column, should write the internal factory number, if the enterprise has verified that the manufacturer has no internal factory number or consistent with the market open model, directly fill in the market open model can be repeated.
I hope the above answers have been helpful.