WM8850
Pre-Production
VMID CONTROL VERB (VENDOR SPECIFIC)
Verb ID
F71h
Payload [7:0]
00h
Response[31:0]
Get
Set
Bits [31:0] in the table below
00000000h
771h
Bits [7:0] in the table below
Bit
Bitfield Name
Rsvd
RW
Default
0000000h
2h
Description
[31:6]
[4:2]
R
Reserved
VMID_RATE
RW
Time allocated to charge VMID:
0h = 1024ms
1h = 512ms
2h = 256ms
3h = 128ms
4h = 64ms
5h = 32ms
6h = 16ms
7h = 8ms
[1:0]
VMID_SEL
RW
2h
VMID String Source Impedance Select:
0h = 12.5k
1h = 75k
2h = 37.5k
3h = 375k
Note: These figures give the value of the resistor from AVDD to VMID
and from VMID to GND.
GPIO AUTOMATIC CONTROL VERB (VENDOR-SPECIFIC)
Verb ID
F86h
Payload [7:0]
00h
Response[31:0]
Get
Set
Bits [31:0] in the table below
00000000h
786h
Bits [7:0] in the table below
Bit
Bitfield Name
Rsvd
RW
R
Default
0000000h Reserved
GPIO2 Control Mode:
Description
[31:1]
[0]
GPIO2_AUTO
RW
1
0 = GPIO2 Manual Mode
GPIO2 is controlled manually via the standard AFG verbs
1 = GPIO Automatic Control Mode
GPIO2 is always an output and forced high when PS-Act of AFG is D1 or
D0. GPIO2 is forced low when PS-Act of AFG is D2, D3 or D4.
UNSOLICITED RESPONSE PRIORITY CONTROL VERB (VENDOR-SPECIFIC)
Verb ID
F8Eh
Payload [7:0]
00h
Response[31:0]
Get
Set
Bits [31:0] in the table below
00000000h
78Eh
Bits [7:0] in the table below
Bit
Bitfield Name
Rsvd
RW
R
Default
0000000h Reserved
00h
Description
[31:5]
[4:0]
Priority
RW
Assigns a priority setting for queued Unsolicited Responses. Nodes with
the lowest value have the highest priority, and so go to the front of the
Unsolicited Response queue. Nodes with the same value for priority are
queued on first-to-trigger basis.
00h = Highest priority
…
1Fh = Lowest priority.
PP, April 2011, Rev 3.2
92
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
