AK4571 Datasheet, PDF (50/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
5.7.2. Get Report Request
Offset
0
1
Field
Size
bmRequestType 1
BRequest
1
Value
0xA1
0x01
2
Wvalue
4
Windex
6
WLength
2
0x0100
2
0x0003
2
0xZZZZ
Description
Class Specific Request
GET_REPORT
Report Type (IN) and Report ID
Interface No (#3)
Report Descriptor Length
5.8.
String
Offset Field
Size Value
0
BmRequestType
1 0x80
1
BRequest
1 0x06
2
wValue
2 0x03??
4
wIndex
6
wLength
2 don't care
2 0xZZZZ
wValue
String Descriptor
Description
GET_DESCRIPTOR String
0x03?? is assigned by host:
0x0300: LangID
0x0301: iManufacturer
0x0302: iProduct
Descriptor Length (ZZZZ is assigned by host)
[AK4571]
MS0153-J-02
- 50 -
2003/3