ASAHI KASEI
[AK4571]
3.4.5.
Standard Endpoint descriptor
Size
Offset
Field
Value
Description
0
bLength
1
0x09
Length of this descriptor
1
2
3
4
6
7
bDescriptorType
bendpointAddress
bmAttributes
wMaxPacketSize
bInterval
1
1
1
2
1
1
0x05
0x81
0x05
0x0064
0x01
0x00
ENDPOINT descriptor
Endpoint 1, IN direction
Isochronous, asynchronous
2byte*50sample*1ch=100 byte/frame
One packet every frame (Must be s et to 1)
Unused
bRefresh
8
bSynchAddress
1
0x00
Unused
3.4.6.
Class-specific isochronous audio data endpoint descriptor
Offset
Field
bLength
bDescriptorType
bDescriptorSubtype
Size
Value
0x07
0x25
0x01
Description
0
1
2
1
1
1
Size of this descriptor
CS_ENDPOINT
EP GENERAL
3
4
5
bmAttributes
bLockDelayUnits
wLockDelay
1
1
2
0x01
0x00
0x0000
sample rate control
Unused
MS0153-J-02
2003/3
- 33 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
