Data Sheet
USB Audio Controller
SN11220ACF
Byte 2：
Byte 2 is used to set data to the register 0 of the two-wire serial port of SN11220ACF.
For detail about how to access the register of the two-wire serial port of SN11220ACF,
please refer to the section “Two-wire serial port definition”.
Byte 3：
Considering together with byte 0, byte 3 is used to control the GPIO ports.
Bit 0 to 3 is used to set the values of GPIO ports if this GPIO is output pin.
Bit 4 to 6 is used to set the control mode of HID. As bellow,
Bit 6 ~ 4
000
HID mode setting
SN11220ACF don’t use
001
HID program EEPROM
Don’t use
010
011
Don’t use
100
HID read EEPROM
101
Byte 0 bit 4 to 7 means GPIO Out/In select
SN11220ACF don’t use
SN11220ACF don’t use
110
111
Bit 7 is used to disable the internal digital volume control feature of SN11220ACF.
The internal digital volume control is used to regulate the volume in SN11220ACF. If
it is enabled, SN11220ACF will receive OS volume command to regulate audio data.
If it is disabled, SN11220ACF will ignore OS volume command.
Byte 4：
Byte 4 is reserved in SN11220ACF.
Byte 5：
Byte 5 is reserved in SN11220ACF.
Byte 6：
Byte 6 is reserved in SN11220ACF.
Sonix Confidential
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Do not copy, reproduce, or distribute without permission
2006 Aug 10, V1.01
SONIX [ SONIX TECHNOLOGY COMPANY ]
