AT43312 Ver la hoja de datos (PDF) - Atmel Corporation

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AT43312

Self- and Bus Powered USB Hub Controller

Atmel Corporation 

AT43312

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-

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.

Device Descriptor

The Device Descriptor provides general information about the AT43312 Hub.

Offset Field

Description

Size (bytes) Value

0 bLength

Define size of this descriptor = 18 bytes

1

0x12

1 bDescriptorType

Device descriptor type

1

0x01

2 bcdUSB

USB Spec. Release Number = Rev 1.0

2

0x00

0x01

4 bDeviceClass

Class code = HUB_CLASSCODE = 09

1

0x09

5 bDeviceSubClass

Subclass code

1

0x00

6 bDeviceProtocol

Protocol code

1

0x00

7 wMaxPacketSize0 Max. packet size for Endpoint0 = 8 bytes

1

0x08

8 idVendor

Vendor ID = Atmel Corporation

2

0xEB

0x03

10 idProduct

Product ID = AT43312

2

0x12

0x33

12 bcdDevice

Device release number

Example :

Revision A0 : yy = 0x01, zz = 0x00

Revision B1 : yy = 0x02, zz = 0x01

2

0XZZ

0XYY

14 iManufacturer

Index of string descriptor describing manufacturer = not supported

1

0x00

15 iProduct

Index of string descriptor describing product = not supported

1

0x00

16 iSerialNumber

Index of string descriptor describing device's serial no. = not supported

1

0x00

17 bNumConfigurations Number of possible configurations = 1

1

0x01

9

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