WM8850 Datasheet, PDF (198/223 Pages) Wolfson Microelectronics plc – Multi-Channel High Definition Audio CODEC

WM8850
Verb ID
Get
F00h
GET PARAMETER VERB
Payload [7:0]
Parameter ID (PID)
Response[31:0]
Parameter Value
Pre-Production
Audio Widget Capabilities Parameter (PID = 09h)
Bit
[31:24]
[23:20]
[19:4]
[3]
[2]
[1:0]
Bitfield Name
RW
Rsvd
R
Type
R
Rsvd
R
Amp Parameter
R
Override
Out Amp Present R
Rsvd
R
Default
00h
7h
0000h
1
1
0h
Description
Reserved
Indicates that this is a Beep Generator Widget
Reserved
The AFG amplifier parameters are overridden for this node
Output amplifier is present in this widget
Reserved
Output Amplifier Capabilities Response Format (PID = 12h)
Bit
[31]
[30:23]
[22:16]
[15]
[14:8]
[7]
[6:0]
Bitfield Name
Mute Capable
Rsvd
Step Size
Rsvd
Num Steps
Rsvd
Offset
RW Default Description
R
0
Beep amplifier does not support mute
R
0000h Reserved
R
17h
Gain step size is 6dB
R
0
Reserved
R
04h
Number of steps in gain range is 5 (0dB to −24dB)
R
0
Reserved
R
04h
The step number that 0dB corresponds to is 04h
BEEP GENERATION VERB
Verb ID
Get
F0Ah
Set
70Ah
Payload [15:0]
0000h
Bits [15:0] in the table below
Response[31:0]
Bits [31:0] in the table below
00000000h
Bit
[31:8]
[7:0]
Bitfield Name
Rsvd
Terminal Count
RW
Default Description
R
0000000h Reserved
RW
00h
Sets tone divider value. The frequency of the beep tone is given by
f = 48kHz / (4 * Divider):
00h = Beep Generator disabled
01h = 12kHz
02h = 6 kHz
…. ….
FFh = 47.06 Hz
Note: for a beep to be generated, the AFG must be in state D0
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PP, April 2011, Rev 3.2
198