ASAHI KASEI
[AK4571]
3.3.7.
Feature Unit Desciptor(ID=5)
Microphone Recording Volume Unit
Offset
Field
Size
Value
Description
0
1
2
3
4
5
Blength
1
1
1
1
1
1
0x08
0x24
0x06
0x05
0x07
0x01
Size of this descriptor
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Selector Unit
BdescriptorType
BdescriptorSubtype
BunitID
BsourceID
BcontrolSize
One byte Control Array
6
7
bmaControls(0)
Ifeature
1
1
0x03
0x00
D0(Mute), D1(Volume) supported
Unused
3.3.8.
Feature Unit Desciptor(ID=6)
Microphone Playback Volume Unit
Offset
Field
Size
Value
Description
0
1
2
3
4
5
6
Blength
1
1
1
1
1
1
1
0x08
0x24
0x06
0x06
0x01
0x01
0x03
Size of this descriptor
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Input Terminal (Microphone)
One byte Control Array
BdescriptorType
BdescriptorSubtype
BunitID
BsourceID
BcontrolSize
bmaControls(0)
D0(Mute) D1(Volume) supported
7
Ifeature
1
0x00
Unused
3.3.9.
Feature Unit Desciptor(ID=8)
Lineout Volume/Bass Boost Unit
Offset
Field
Size
Value
Description
0
blength
1
0x0D
Size of this descriptor
1
2
3
4
5
6
bdescriptorType
bdescriptorSubtype
bunitID
BsourceID
BcontrolSize
bmaControls(0)
1
1
1
1
1
1
0x24
0x06
0x08
0x09
0x02
0x0101
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Mixer Unit(ID9)
Two byte Control Array
D0(Mute) , D8(Bass Boost)is enable for
channel0
8
10
12
bmaControls(1)
bmaControls(2)
IFeature
1
1
1
0x0002
0x000 2
0x00
D1(Volume) control is enable for channel 1
D1(Volume) control is enable for channel 2
Unused
MS0153-J-02
2003/3
- 29 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
