CM6502B Datasheet, PDF (14/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
1
bDescriptorType
1
2
wTotalLength
2
4
bNumInterfaces
1
5
bConfigurationValue
1
6
iConfiguration
1
7
bmAttributes
1
8
bMaxPower
1
02
011D
04
01
00
80
32
Configuration Descriptor
Total length of data returned for this configuration:
285 Bytes
Number of interfaces supported by this Configuration:
00: Control
01: ISO-Out
02: ISO-In
03: INT-In (HID)
Configuration value
Index of string descriptor describing this configuration
Attributes(Bus Powered)
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
6.2 Speaker Topology
0x01
IT
USB STREAM
0x03
FEA
0x02
OT
SPEAKER
Device Descriptor
Offset
Field
0
bLength
1
bDescriptorType
2
bcdUSB
4
bDeviceClass
5
bDeviceSubClass
6
bDeviceProtocol
7
bMaxPacketSize0
8
idVendor
10
idProduct
12
bcdDevice
14
iManufacturer
15
iProduct
16
iSerialNumber
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Copyright © C-Media Electronics Inc.
Size
1
1
2
1
1
1
1
2
2
2
1
1
1
Value (Hex)
Description
12
Descriptor length
01
Device Descriptor
0110
USB 1.1 compliant
00
Device class specified by interface
00
Device subclass specified by interface
00
Device protocol specified by interface
10
Endpoint zero packet size
0D8C Vendor ID
0180~018F Product ID
0000
Device release number
01
Index of string descriptor describing manufacturer
02
Index of string descriptor describing product
00
Index of string descriptor describing serial number
Rev. 1.02 ︱ Page 14