CM6500B Datasheet, PDF (23/36 Pages) C-Media Electronics – USB Audio Sound Chip

CM6500 / CM6500B
USB Audio Sound Chip
bmRequestType bRequest
wValue
wIndex
8’h 21
8’h 09
(Set_Report)
16’h 02 01
(Rpt Type + Rpt
ID)
16’h 00 03
(Interface)
*Note: Byte5 is the beginning address of this write sequence.
wLength Data
16’h 00 10
Report
(16 bytes)
Output Data Format:
byte 0
byte1
byte2
byte3
byte4
byte5
byte6
byte7
byte8
byte9
byte10
byte11
byte12
byte13
byte14
byte15
always 1 for org HID event report ID
start address of write reg (H-start_addr)
start address of write reg (L-start_addr)
effective write/read data length (<=12)
write data to [start_addr]
write data to [start_addr+1]
write data to [start_addr+2]
write data to [start_addr+3]
write data to [start_addr+4]
write data to [start_addr+5]
write data to [start_addr+6]
write data to [start_addr+7]
write data to [start_addr+8]
write data to [start_addr+9]
write data to [start_addr+10]
write data to [start_addr+11]
7.3 Vendor Command Definition
7.3.1 Vender Command Read
Command Format:
bmRequestType bRequest
8’h C3
8’h 02
(Command 2)
wValue
16’h -- --
(Start Address of
input Data)
wIndex
16’h 00 00
wLength
16’h 00 –
(<=64 bytes)
Data
Data
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