ASAHI KASEI
[AK4571]
3.3.
Interface Descriptor # 0
Standard Audio Control Interface Descriptor
3.3.1.
Offset
Field
bLength
bDescriptorType
Size
1
1
Value
0x09
0x04
Description
Size of this descriptor
INTERFACE descriptor
0
1
2
3
4
5
6
7
bInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubclass
bInterfaceProtocol
1
1
1
1
1
1
0x00
0x00
0x00
0x01
0x01
0x00
Index of this interface
Index of this setting
only uses Endpoint 0
AUDIO
AUDIO_CONTROL
not vendor or class specific
8
IInterface
1
0x00
null string
Table Standard Interface Descriptor
3.3.2.
Class -Specific Audio Control Interface Descriptor
Offset
Field
BLength
bDescriptorType
bDescriptorSubtype
BcdADC
Size
Value
0x0A
0x24
0x01
0x0100
Description
Size of this descriptor
CS_INTERFACE
HEADER subtype
Revision of class specification – 1.00
0
1
2
3
1
1
1
2
5
wTotalLength
2
0x0065
Total size of class-specific Audio Control
Interface descriptors 101 byte
(includes this descriptor)
7
8
binCollection
baInterfaceNr(0)
1
1
0x02
0x01
The number of streaming interfaces
Streaming interface number 1 belongs to
this audio control interface. IN Interface
9
baInterfaceNr(1)
1
0x02
Streaming interface number 2 belongs to
this audio control interface. OUT Interface
MS0153-J-02
2003/3
- 26 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
