AK4571 Datasheet, PDF (25/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
3.
3.1.
Device Descriptor
Offset
0
1
2
4
5
6
7
8
10
12
14
15
16
17
3.2.
Field
Size
bLength
1
bDe scriptorType
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
Configuration Descriptor
Value
Description
0x12
Size of this descriptor in bytes
0x01
DEVICE descriptor
0x0110 1.10 - current revision of USB spec.
0x00
Device defined at Interface level
0x00
Unused
0x00
Unused
0x08
8 bytes
0x0556 AKM’s Vendor ID
0x000 4 Upper 00 means Audio Product
Lower 04 means AKM product ID
0x0100 Device release code
0x01
“ AKM ”
0x02
“ AK4571”
0x00
Unused
0x01
One configuration
Table Device Descriptor
Offset
0
1
2
Field
Blength
bDescriptorType
WTotalLength
Size Value
1 0x09
1 0x02
2 0x011C
4 BnumInterfaces
5 bConfigurationValue
6 IConfiguration
7 BmAttributes
8 MaxPower
1 0x0 4
1 0x01
1 0x00
1 0x80
1 0x31
Description
Size of this descriptor
CONFIGURATION descriptor
length of entire configuration block
total 284 bytes including this interface
descriptor.
Four interfaces
index of this configuration
null string
supports Bus Powered Device
98mA
MS0153-J-02
- 25 -
2003/3