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5.2.3
Descriptor (PC <- Starter kit)
In this sample program, the data returned from the starter kit to the PC (USB host) is called
a descriptor. A descriptor contains information about the device, such as characteristics and
attributes. The format of data in a descriptor is standardized. The descriptors returned from
the starter kit to the PC (USB host) are shown below.
Table 5.2.3-1 Device Descriptor
Byte
1
1
2
Item
bLength
bDescriptorType
bcdUSB
Descriptor size (12h)
Descriptor type (10h)
USB version (Rev. 1.01)
Description
12h
01h
01h
Value
01h
1
1
1
1
2
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
idVendor
Class code (00h: no class)
Subclass code
Protocol code (00h: unique protocol unused)
Max. packet size for endpoint 0
Vendor ID (04C5h: Fujitsu)
00h
00h
00h
40h
C5h
04h
2
idProduct
Product ID (2019h: USB starter kit)
19h
20h
2
bcdDevice
Device version
FFh
FFh
1
1
1
1
iManufacture
iProduct
iSerialNumber
bNumConfigurations
Index of a string descriptor that represents the manufacturer
Index of a string descriptor that represents the product
Index of a string descriptor that represents the serial number
Number of configurations supported
00h
00h
00h
01h
75
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