AK5371A Datasheet, PDF (17/32 Pages) Asahi Kasei Microsystems – 2ch A/D Converter with USB I/F

ASAHI KASEI
[AK5371A]
3.4 Audio streaming interface
3.4.1
Offset
0
1
2
3
4
5
6
7
8
Zero bandwidth interface descriptor
Field
Size Value
bLength
1 0x09
bDescriptorType
1 0x04
bInterfaceNumber
1 0x01
bAlternateSetting
1 0x00
bNumEndpoints
1 0x00
bInterfaceClass
1 0x01
bInterfaceSubclass
1 0x02
bInterfaceProtocol
1 0x00
iInterface
1 0x00
Description
Length of this descriptor
INTERFACE descriptor
Index of this interface
Index of this setting
Endpoints 0
AUDIO
AUDIO_STREAMING
Unused
null string
3.4.2
Offset
0
1
2
3
4
5
6
7
8
Interface descriptor(Alt = 1, 16bit Mono)
Field
Size Value
bLength
1 0x09
bDescriptorType
1 0x04
bInterfaceNumber
1 0x01
bAlternateSetting
1 0x01
bNumEndpoints
1 0x01
bInterfaceClass
1 0x01
bInterfaceSubclass
1 0x02
bInterfaceProtocol
1 0x00
iInterface
1 0x00
Description
Length of this descriptor
INTERFACE descriptor
Index of this interface
Index of this setting
Endpoint 1
AUDIO
AUDIO_STREAMING
Unused
null string
3.4.3
Offset
0
1
2
3
4
5
Class-specific audio streaming interface descriptor
Field
Size Value
bLength
1 0x07
bDescriptorType
1 0x24
bDescriptorSubtype 1 0x01
bTerminalLink
1 0x02
bDelay
1 0x01
wFormatTag
2 0x0001
Description
Length of this descriptor
CS_INTERFACE descriptor
AS_GENERAL
Unit ID of terminal(Output Terminal ID)
Interface delay
PCM
3.4.4
Offset
0
1
2
3
4
5
6
7
8
11
14
17
20
Type I format type descriptor
Field
Size
blength
1
bDescriptorType
1
bdescriptorSubtype 1
bformatType
1
bNrChannels
1
bSubFrameSize
1
bBitResolution
1
bSamFreqType
1
tSamFreq[0]
3
tSamFreq[1]
3
tSamFreq[2]
3
tSamFreq[3]
3
tSamFreq[4]
3
Value
0x17
0x24
0x02
0x01
0x01
0x02
0x10
0x05
0x001F40
0x002B11
0x005622
0x00AC44
0x00BB80
Description
Size of this descriptor
CS_INTERFACE
FORMAT_TYPE
FORMAT_TYPE_I
One channel
Two bytes per slot
16 bits
Five frequencies
8000Hz
11025Hz
22050Hz
44100Hz
48000Hz
MS0546-E-00
MS0103-E-00
17
2007/02