Data Sheet
USB Audio Controller
SN11220ACF
Bit 0 and 1 are linked to the master volume control bar of the audio control panel in
the OS.
Bit 2 is linked to the master playback mute checkbox of the audio control panel in the
OS.
Bit 3 is used to mute the recording. But there is no this command in OS. SONiX
design this function in the SN11220.
Bit 4 to 7 is corresponding to the value of GPIO 0 to 3.
Byte 1：
Byte 1 is used to return the register 0 value received by the two-wire serial port of
SN11220ACF. Please refer to section VIII.
Byte 2：
Byte 2 is used to return the register 1 value received by the two-wire serial port of
SN11220ACF. Please refer to section VIII.
Byte 3：
Byte 3 can be ignored for SN11220ACF.
Byte 4：
Byte 4 can be ignored for SN11220ACF.
Byte 5：
Byte 5 can be ignored for SN11220ACF.
Byte 6：
Byte 6 can be ignored for SN11220ACF.
Byte 7：
Byte 7 is used to return the register 2 value received by the two-wire serial port of
SN11220ACF. Please refer to section VIII.
Byte 8：
Byte 8 is used to return the register 3 value received by the two-wire serial port of
SN11220ACF. Please refer to section VIII.
Sonix Confidential
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Do not copy, reproduce, or distribute without permission
2006 Aug 10, V1.01
SONIX [ SONIX TECHNOLOGY COMPANY ]
