CM6502B Datasheet, PDF (27/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
7.5 Vendor Command Definition
7.5.1 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
Input Data Format:
Byte 0
Byte 1
Byte 2
…
Byte 63
Data of Reg[wValue]
Data of Reg[wValue + 1]
Data of Reg[wValue + 2]
…
Data of Reg[wValue + 63]
7.5.2 Vender Command Write
Command Format:
bmRequestType bRequest
8’h 43
8’h 01
(Command 1)
wValue
16’h -- --
(Start Address of
Output Data)
wIndex
16’h 00 00
wLength
16’h 00 –
(<=64 bytes)
Data
Data
Output Data Format:
Byte 0
Byte 1
Byte 2
…
Byte 63
Data of Reg[wValue]
Data of Reg[wValue + 1]
Data of Reg[wValue + 2]
…
Data of Reg[wValue + 63]
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