CM6327A
USB Single-Chip Audio Solution for Mono Microphone
6.4 Standard HID Interface Descriptors
Offset
Field
Size
1
Value (Hex)
Description
0
1
2
3
4
5
6
7
8
bLength
09
04
02
00
01
03
00
00
00
Descriptor length
bDescriptorType
bInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
iInterface
1
Interface descriptor
1
Interface number: 02
Alternate interface
1
1
Number of endpoints used by this interface
HID interface class
1
1
Subclass code
1
Protocol code
1
Interface string descriptor index
Class-specific HID Interface Descriptors
Offset
Field
Size
Value (Hex)
Description
Descriptor length
0
1
2
4
5
6
7
bLength
1
1
2
1
1
1
2
09
21
bDescriptorType
bcdHID
HID descriptor type
HID class version
0100
00
bCountryCode
bNumDescriptors
bDescriptorType
wDescriptorLength
No country code
01
One HID class descriptor
Report Descriptor
22
0032 / 001a HID class descriptor length in byte: 50 / 26 bytes
(Enable / Disable HID Button)
Standard HID Interrupt In Endpoint Descriptors
Offset
Field
Size
Value (Hex)
Description
0
1
2
3
4
6
bLength
1
1
1
1
2
1
07
05
Descriptor length
bDescriptorType
bEndpointAddress
bmAttributes
wMaxPacketSize
bInterval
Endpoint descriptor
87
IN endpoint, endpoint number: 7
Interrupt endpoint
03
0010
01
Maximum packet size: 16 bytes
1ms
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