Supporting USB - USB Mass Storage: Designing and Programming Devices and Embedded Hosts - page 35

Table 2-1: Example descriptors for a full-speed mass-storage device (Sheet 1 of
2).
Device Descriptor
0x12 Descriptor size in bytes (18)

0x01 Descriptor type (DEVICE)

0x0200 USB specification release (BCD) (2.00)

0x00 Class (specified at interface level)

0x00 Subclass (specified at interface level)

0x00 Protocol (specified at interface level)

0x40 Maximum packet size for endpoint zero (64)

0x04D8 Vendor ID (Microchip Technology; assigned by USB-IF)

0x0009 Product ID (assigned by vendor)

0x0100 Device release number (BCD, assigned by vendor) (1.00)

0x01 Manufacturer string index

0x02 Product string index

0x03 Serial number string index

0x01 Number of possible configurations

Configuration Descriptor
0x09 Descriptor size in bytes (9)

0x02 Descriptor type (CONFIGURATION)

0x0020 Total length of this and subordinate descriptors

0x01 Number of interfaces in this configuration

0x01 Identifier for this configuration

0x00 Configuration string index (no string defined)

0xC0 Attributes: self powered, no remote wakeup

0x32 Maximum power consumption (100 mA)

Interface Descriptor
0x09 Descriptor size in bytes (9)

0x04 Descriptor type (INTERFACE)

0x00 Interface Number

0x00 Alternate Setting Number

0x02 Number of endpoints in this interface

0x08 Class code (mass storage)

0x06 Subclass code (SCSI transparent command set)

0x50 Protocol code (bulk-only transport)