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
AUDIO FUNCTION GROUP (NID = 01H)
FUNCTION RESET VERB
Verb ID
Payload [7:0]
Response[31:0]
Execute
7FFh
00h
00000000h
Bit
Bitfield Name
RW
Default
00h
Description
[7:0]
Reset
W
AFG reset.
00h = AFG and all widget nodes associated with the AFG will reset to
default values. The WM8850 will issue a response and then be ready to
accept commands in the frame following the valid response.
Note: The Implementation ID/Subsystem ID Verb and the Configuration
Default Verb will not be reset using this verb.
GET PARAMETER VERB
Verb ID
Payload [7:0]
Response[31:0]
Get
F00h
Parameter ID (PID)
Parameter Value
Subordinate Node Count Response Format (PID = 04h)
Bit
Bitfield Name
Rsvd
RW
R
Default
00h
Description
[31:24]
[23:16]
[15:8]
[7:0]
Reserved
Starting NID
Rsvd
R
02h
Starting NID of the first widget in the AFG
Reserved
R
00h
Total Nodes
R
16h
Total number of widget nodes within the AFG
Function Group Type Response Format (PID = 05h)
Bit
Bitfield Name
Rsvd
RW
R
Default
000000h
1
Description
[31:9]
[8]
Reserved
Unsol
R
The AFG Node is capable of generating Unsolicited Responses
Node Type is Audio Function Group
[7:0]
Node Type
R
01h
Audio Function Group Capabilities Response Format (PID = 08h)
Bit
Bitfield Name
Rsvd
RW
R
Default
0000h
1
Description
[31:17]
[16]
Reserved
Beep Gen
Rsvd
R
Beep Generator Widget present
Reserved
[15:12]
[11:8]
[7:4]
R
00h
8h
Input Delay
Rsvd
R
Number of samples of input delay
Reserved
R
00h
8h
[3:0]
Output Delay
R
Number of samples of output delay
Input Amplifier Capabilities Response Format (PID = 0Dh)
Bit
Bitfield Name
Mute Capable
Rsvd
RW
R
Default
0
Description
[31]
Microphone preamplifers are not capable of muting
[30:23]
[22:16]
[15]
R
00h
27h
0
Reserved
Step Size
Rsvd
R
Gain step size is 10dB
R
Reserved
[14:8]
[7]
Num Steps
Rsvd
R
03h
0
Number of steps in gain range is 4 (0dB to +30dB)
Reserved
R
[6:0]
Offset
R
0h
The step number that 0dB corresponds to is 0
PP, April 2011, Rev 3.2
87
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
