AK5374 AKM [Asahi Kasei Microsystems], AK5374 Datasheet - Page 30

• Manufacturer Part Number: AK5374
• Description: 24-bit Stereo ADC with USB Interface
• Manufacturer: AKM [Asahi Kasei Microsystems]

4.2.3 Type I Format Type Descriptor
4.2.4 Standard Endpoint Descriptor
4.2.5 Class-specific Isochronous Audio Data Endpoint Descriptor
4.3 Operational Alternate Setting 2
4.3.1 Standard Audio Streaming Interface Descriptor (Alt = 2: Mono, 16bit, 48k)
MS1197-E-00
Offset
Offset
Offset
Offset
11
0
1
2
3
4
5
6
7
8
0
1
2
3
4
6
7
8
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
bLength
bDescriptorType
bDescriptorSubtype
bFormatType
bNrChannels
bSubFrameSize
bBitResolution
bSamFreqType
tSamFreq[0]
tSamFreq[1]
bLength
bDescriptorType
bEndpointAddress
bmAttributes
wMaxPacketSize
bInterval
bRefresh
bSynchAddress
bLength
bDescriptorType
bDescriptorSubtype
bmAttributes
bLockDelayUnits
wLockDelay
bLength
bDescriptorType
bInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubclass
bInterfaceProtocol
iInterface
Field
Field
Field
Field
Size
Size
Size
Size
1
1
1
1
1
1
1
1
3
3
1
1
1
1
2
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
0x0E
0x24
0x02
0x01
0x01
0x01
0x08
0x02
0x001F40
0x003E80
0x09
0x05
0x81
0x0D
0x0010
0x01
0x00
0x00
0x07
0x25
0x01
0x01
0x00
0x0000
0x09
0x04
0x01
0x02
0x01
0x01
0x02
0x00
0x00
Value
Value
Value
Value
- 30 -
Size of this descriptor in bytes
ENDPOINT descriptor
Endpoint 1, IN direction
Isochronous, synchronous, not shared
1byte*16sample*1ch=16 byte/frame
One packet every frame (Must be set to 1)
Size of this descriptor in bytes
CS_ENDPOINT
GENERAL
Sample rate control
Unused
Size of this descriptor in bytes
INTERFACE descriptor
Index of this interface
Index of this setting
Endpoint 1
AUDIO
AUDIO_STREAMING
Not used. Must be set to 0.
Null string
Size of this descriptor in bytes
CS_INTERFACE
FORMAT_TYPE
FORMAT_TYPE_I
One channel
One byte per slot
8 bits
Two frequencies
8000Hz
16000Hz
Description
Description
Description
Description
[AK5374]
2010/05