Cirrus Logic CS4207 - Manual (Page 61)

DS880F4 61
CS4207
6.5.14 Amplifier Gain/Mute
Get Parameter Command Format:
Bits [19:16] = ‘Bh’, where bits [15:0] are defined below:
Response Format:
Set Parameter Command Format:
Bits [19:16] = ‘3h’, where bits [15:0] are defined below:
Bits [31:28] Bits [27:20] Bits [19:16] Bits [15:0]
CAd = X ADC1 Node ID=05h
ADC2 Node ID=06h Verb ID = Bh Payload = xxxxh
Bits [15:0] Value Description
15 0b
Get Output/Input (GOI): Controls whether the request is for the input
amplifier or the output amplifier. When ‘0’, the input amplifier is being
requested. When ‘1’, the output amplifier is being requested.
14 0b ‘0’b
13 xb
Get Left/Right (GLR): This bit controls whether the request is for the
left channel amplifier or the right channel amplifier. When ‘1’, the left
channel amplifier is being requested. When ‘0’, the right channel ampli-
fier is being requested.
12:4 000000000b Reserved
3:0 0000b
Index (IDX): This field specifies the input index of the amplifier setting
to return if the widget has multiple input amplifiers. It is only applicable
if “Get Output/Input” is ‘0’ which indicates input amplifier is being
requested. This field has no meaning and ignored since the widget
does not have multiple input amplifiers. It should be always ‘0’s.
Bits Type Default Description
31:8 Read Only 000000h Reserved
7 Read Only 1b
Amplifier Mute (AM): This bit returns the Mute
setting for the amplifier requested. A 1 indicates
the amplifier is in the Mute condition. If the ampli-
fier requested does not exist, a ‘0’ will be
returned. Default equals Muted.
6:0 Read Only 0110011b
Amplifier Gain (AG): This field returns the Gain
setting for the amplifier requested. If the amplifier
requested does not exist, all ‘0’s will be returned
Default equals 0 dB.
Bits [31:28] Bits [27:20] Bits [19:16] Bits [15:0]
CAd = X ADC1 Node ID=05h
ADC2 Node ID=06h Verb ID = 3h Payload = xxxxh
Bits Type Default Description
15 Write Only 0b
Set Output Amplifier (SOA): Bit is always ‘0’
since an output amplifier is not present.
14 Write Only xb
Set Input Amplifier (SIA): Determines if the
value programmed refers to the input amplifier.
Set to a 1 for the value to be accepted.