CM6502B Datasheet, PDF (15/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
17
bNumConfigurations
1
01
Number of configuration
Configuration Descriptor
Offset
Field
0
bLength
1
bDescriptorType
2
wTotalLength
4
bNumInterfaces
5
bConfigurationValue
6
iConfiguration
7
bmAttributes
8
bMaxPower
Size
1
1
2
1
1
1
1
1
Value (Hex)
Description
09
Descriptor length
02
Configuration Descriptor
0099
Total length of data returned for this configuration:
153 Bytes
03
Number of interfaces supported by this Configuration:
00: Control
01: ISO-Out
02: INT-In (HID)
01
Configuration value
00
Index of string descriptor describing this configuration
80
Attributes(Bus Powered)
32
Maximum power consumption from bus = 100mA:
8’h32 (50x2 mA) (PWRSEL_2 = 1)
Audio Control Interface 0 Descriptor 0
Offset
Field
Size Value (Hex)
Description
0
bLength
1
09
Descriptor length
1
bDescriptorType
1
04
Interface Descriptor
2
bInterfaceNumber
1
00
Interface number
3
bAlternateSetting
1
00
Alternate interface
4
bNumEndpoints
1
00
Number of endpoint used by this interface
5
bInterfaceClass
1
01
Audio Interface Class
6
bInterfaceSubClass
1
01
Subclass code: AUDIO_CONTROL
7
bInterfaceProtocol
1
00
Protocol code
8
iInterface
1
00
Index of string descriptor describing this interface
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