AK5371A Datasheet, PDF (15/32 Pages) Asahi Kasei Microsystems – 2ch A/D Converter with USB I/F

ASAHI KASEI
AK5371A Descriptors Specification
[AK5371A]
1 Device descriptor
Offset
0
1
2
4
5
6
7
8
10
12
14
15
16
17
Field
Size
bLength
1
bDescriptorType
1
bcdUSB
2
bDeviceClass
1
bDeviceSubClass
1
bDeviceProtocol
1
bMaxPacketSize0
1
idVendor
2
idProduct
2
bcdDevice
2
iManufacturer
1
iProduct
1
iSerialNumber
1
bNumConfigurations 1
Value
0x12
0x01
0x0110
0x00
0x00
0x00
0x08
0x0556
0x0002
0x0001
0x01
0x02
0x00
0x01
Description
Size of this descriptor in bytes
DEVICE descriptor
1.10 – current revision of USB spec.
Device defined at Interface level
Unused
Unused
8 bytes
AKM’s Vendor ID
00 means Audio Product, 02 is AKMproduct ID ,
Device release code
“AKM”
“AK5371”
Unused
One configuration
2 Configuration Descriptor
The configuration block consists of a configuration descriptor followed by interface, endpoint, and class-specific
descriptors.
Offset Field
Size Value
Description
0
bLength
1 0x09
Size of this descriptor
1
bDescriptorType
1 0x02
CONFIGURATION descriptor
2
wTotalLength
2 0x00B1
Length of entire configuration block
Total 177 bytes including this interface
descriptor.
4
bNumInterfaces
1 0x02
Two interfaces
5
bConfigurationValue
1 0x01
Index of this configuration
6
iConfiguration
1 0x00
Null string
7
bmAttributes
1 0x80
Bus Powered Device
8
MaxPower
1 0x2D
Power consumption: 90mA
3 Interface Descriptor
3.1 Standard Audio Control Interface descriptor
3.1.1 This descriptor describes a standard interface which includes USB class code and the index to class-specific
information.
Offset Field
Size Value
Description
0
bLength
1 0x09
Size of this descriptor
1
bDescriptorType
1 0x04
INTERFACE descriptor
2
bInterfaceNumber
1 0x00
Index of this interface
3
bAlternateSetting
1 0x00
Index of this setting
4
bNumEndpoints
1 0x00
Endpoint 0
5
bInterfaceClass
1 0x01
AUDIO
6
bInterfaceSubclass
1 0x01
AUDIO_CONTROL
7
bInterfaceProtocol
1 0x00
Unused
8
iInterface
1 0x00
null string
MS0546-E-00
MS0103-E-00
15
2007/02