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Spinpoint M8U-Internal Product Manual REV 3.4
85
INSTALLATION
Table 6-20: Bulk Only Transport Device Descriptor
The iSerialNumber field shall be set to the index of the string descriptor that contains the serial number. The
serial number shall contain at least 12 valid digits, represented as a UNICODE string. The last 12 digits of the
serial number shall be unique to each USB idVendor and idProduct pair.
The host may generate a globally unique identifier by concatenating the 16 bit idVendor, the 16 bit idProduct
and the value represented by the last 12 characters of the string descriptor indexed by iSerialNumber. The
field iSerialNumber is an index to a string descriptor and does not contain the string itself. An example
format for the String descriptor is shown below. (Table 6-21)
Table 6-21: Example Serial Number Format