CM6206 Datasheet, PDF (10/35 Pages) C-Media Electronics – High Integrated USB Audio I/O Controller

CM6206
High Integrated USB Audio I/O Controller
5 Block Diagram
Figure 2：Function Block Diagram of CM6206
6 Function Descriptions Block Diagram of CM6206
6.1 Internal Register
The internal registers of CM6206 can be divided to two parts. Some of them (REG0, REG1, REG2, REG3,
REG4 and REG5) are 16-bit width and can be accessed via HID interface SET_RPT request. The others
(REG8~ REG14) are 8-bit width and can be accessed by vendor requests.
To access registers via HID interface, users should issue a “Set Output Report” HID request. The four
bytes of output report data is organized as below:
Byte [0]
Byte [1]
Byte [2]
Byte [3]
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Bit5 = 1 => Access internal register
Bit4 = 1 => read Bit4 = 0 => write
DATAL
DATAH
Register address (0, 1, 2, 3, 4, 5)
Rev. 2.3 ︱ Page 10/37