at43312 ATMEL Corporation, at43312 Datasheet - Page 9

• Manufacturer Part Number: at43312
• Description: Self- And Bus- Powered Usb Hub Controller
• Manufacturer: ATMEL Corporation

Descriptors
The Hub Controller supports the following standard USB
descriptors: Device, Configuration, Interface, and Endpoint
Descriptors, as well as the class-specific Hub Descriptor.
All the obligatory Standard Requests and Hub Class-Spe-
Device Descriptor
The Device Descriptor provides general information about the AT43312 Hub.
Offset
10
12
14
15
16
17
0
1
2
4
5
6
7
8
Field
bLength
bDescriptorType
bcdUSB
bDeviceClass
bDeviceSubClass
bDeviceProtocol
wMaxPacketSize0
idVendor
idProduct
bcdDevice
iManufacturer
iProduct
iSerialNumber
bNumConfigurations
Subclass code
Description
Define size of this descriptor = 18 bytes
Device descriptor type
USB Spec. Release Number = Rev 1.0
Class code = HUB_CLASSCODE = 09
Protocol code
Max. packet size for Endpoint0 = 8 bytes
Vendor ID = Atmel Corporation
Product ID = AT43312
Device release number
Example :
Revision A0 : yy = 0x01, zz = 0x00
Revision B1 : yy = 0x02, zz = 0x01
Index of string descriptor describing manufacturer = not supported
Index of string descriptor describing product = not supported
Index of string descriptor describing device's serial no. = not supported
Number of possible configurations = 1
cific Requests are supported by the AT43312’s Hub Con-
troller. The description is given for the self-powered mode
of operation. Unique parameters for the bus-powered mode
is given in case of differences.
Size (bytes)
1
1
2
1
1
1
1
2
2
2
1
1
1
1
Value
0XZZ
0XYY
0xEB
0x12
0x01
0x00
0x01
0x09
0x00
0x00
0x08
0x03
0x12
0x33
0x00
0x00
0x00
0x01
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