Pre-Production
WM8850
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
PORT-B PIN COMPLEX WIDGET (NID = 0DH)
AMPLIFIER GAIN/MUTE VERB
Verb ID
Payload [15:0]
Response[31:0]
Get
Get
Set
Bh
2000h
Bits [31:0] in the response table below –
applies to the left channel only
Bh
3h
0000h
Bits [31:0] in the response table below –
applies to the right channel only
Bits [15:0] in the set table below
00000000h
Response Table:
Bit
Bitfield Name
RW
R
Default
000000h
0
Description
[31:8]
[7]
Rsvd
Reserved
Amplifier Mute
Amplifier Gain
R
Mute not supported
[6:0]
R
00h
Shows the amplifier gain setting (step number) for the selected channel.
The actual gain applied is determined by the Input Amplifier Capabilities
Parameter in the AFG (NID = 01h), and is shown below for convenience:
00h = 0dB
01h = +10dB
02h = +20dB
03h = +30dB
Set Table:
Bit
Bitfield Name
Set Output Amp
Set Input Amp
Set Left Amp
RW
R
Default
Description
[15]
[14]
[13]
0
1
1
Not applicable to this widget
W
Indicates that the programming refers to the input amplifier on this widget
W
0 = Left channel amplifier does not accept the values in Mute or Gain
fields
1 = Left channel amplifier does accept the values in the Mute and Gain
fields
[12]
Set Right Amp
W
1
0 = Right channel amplifier does not accept the values in Mute or Gain
fields
1 = Right channel amplifier does accept the values in the Mute and Gain
fields
[11:8]
[7]
Index
Mute
Gain
R
R
0h
0
Not applicable to this widget
Mute not supported
[6:0]
W
0h
Step number of the gain – see Amplifier Gain in response table above for
details of actual gain values
Note: Port-B amplifier implements Mic-Boost. The gain setting is always
applied to both left and right channels when either (or both) the Set Left
Amp or Set Right Amp registers are set. Dedicated boost settings for
each channel are not supported.
PP, April 2011, Rev 3.2
155
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
