CM103 查看數據表（PDF） - C-Media Electronics

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CM103

16-Bit Stereo USB Audio Controller

C-Media Electronics 

CM103+

USB Stereo Audio Chip for Digital Speakers Application

4 bNumEndpoints 1

5

bInterfaceClass 1

6 bInterfaceSubClass 1

7 bInterfaceProtocol 1

8

iInterface

1

Number of endpoints used by this

01

Interface: 1

03

HID Interface Class

00

No Subclass

00

Must be set to 0

Index of a string descriptor that

00

describes this interface.

HID Descriptor

Offset

Field

Size Value (Hex)

Description

0

bLength

1

09

Total 9 Bytes

1 bDescriptorType 1

21

HID Descriptor Type

2

bcdHID

2

0100 HID class version 1.00

4

bCountryCode 1

00

5 bNumDescriptors 1

01

6 bDescriptorType 1

22

Report Descriptor

7 wDescriptorLength 2

002A

Numeric expression that is the

total size of the optional descriptor

Interrupt IN Endpoint Descriptor

Offset

Field

Size Value (Hex)

Description

0

bLength

1

07

Total 7 Bytes

1 bDescriptorType 1

05

ENDPOINT Descriptor Type

2 bEndpointAddress 1

IN Endpoint

81

Endpoint number = 3

3

bmAttributes

1

03

Interrupt endpoint type

4 wMaxPacketSize 2

0003 Maximum packet size: 4 bytes

6

bInterval

1

04

Interrupt Interval: 4ms

Date: 09/25/2005

- 17 -

Version: 1.01

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