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
PGA1 SELECTOR WIDGET (NID = 0AH)
AMPLIFIER GAIN/MUTE VERB
Verb ID
Payload [15:0]
Response[31:0]
Get
Get
Set
Bh
A000h
Bits [31:0] in the response table below –
applies to the left channel only
Bh
3h
8000h
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
1
Description
[31:8]
[7]
Rsvd
Reserved
Amplifier Mute
R
Shows the amplifier mute status of the selected channel:
0 = Normal
1 = Muted
[6:0]
Amplifier Gain
R
18h
Shows the amplifier gain setting (step number) for the selected channel.
The actual gain applied is determined by the Output Amplifier
Capabilities Parameter, and is shown below for convenience:
00h = −12dB
01h = −11.5dB
… 0.5dB steps
2Fh = +11.5dB
30h = +12dB
Note: If the BTL register in the Port-E Pin Widget (NID=0Ch) EAPD/BTL
Verb is set to 0, the input is single-ended and the actual gain setting
applied has an offset of −3dB from the setting configured by the Gain
register.
Set Table:
Bit
Bitfield Name
RW
Default
Description
[15]
Set Output Amp
W
1
Indicates that the programming refers to the output amplifier on this
widget
[14]
[13]
Set Input Amp
Set Left Amp
W
W
0
1
Not applicable to this widget
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
W
W
0h
1
Not applicable to this widget
0 = Normal operation
1 = Mute
Note: When mute is applied to a channel, the data value is overwritten
with all zeros.
[6:0]
Gain
W
18h
Step number of the gain – see Amplifier Gain in response table above for
details of actual gain values
PP, April 2011, Rev 3.2
141
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
