Pre-Production
WM8850
UNSOLICITED RESPONSE DEFINITIONS
Table 34 gives a summary of the definitions of the Unsolicited Responses from each node in the
WM8850. Note that these responses are generated only when the node is set to generate them,
using the Unsolicited Reponse Verb as defined in the HDA specification.
NID
NODE
NAME
AFG
UNSOLICITED RESPONSE
BIT
FLAG NAME
DESCRIPTION
Tag
A software programmable tag value. The default value is equal to
the Node ID. Other values can be configured using the Unsolicited
Response Verb.
01h
[31:26]
Rsvd
Reserved
[25:4]
[3:2]
SF_GPIO2
Indicates that the value on GPIO2 (configured as an input) has
changed, and reports new status value.
When the AFG is in power state D0, D1 or D2, a change in GPIO
status triggers an Unsolicited Response.
When the AFG is in power state D3, a change in GPIO status
triggers a power state change request.
Note that the status value is also accessible through the Get GPIO
Data Verb.
SF_GPIO1
Indicates that the value on GPIO1 (configured as an input) has
changed, and reports new status value.
[1:0]
When the AFG is in power state D0, D1 or D2, a change in GPIO
status triggers an Unsolicited Response.
When the AFG is in power state D3, a change in GPIO status
triggers a power state change request.
Note that the status value is also accessible through the Get GPIO
Data Verb.
Tag
A software programmable tag value. The default value is equal to
the Node ID. Other values can be configured using the Unsolicited
Response Verb.
02h
ADC1
[31:26]
Rsvd
Reserved
[25:1]
[0]
EF_STREAM_DROP Indicates that the stream associated with the ADC1 node has been
dropped due to the bandwidth of the SDI line being
oversubscribed.
Assertion of the flag triggers an Unsolicited Response.
The flag is cleared when the Stream ID is written to.
Tag
A software programmable tag value. The default value is equal to
the Node ID. Other values can be configured using the Unsolicited
Response Verb.
03h
MIC1
[31:26]
Rsvd
Reserved
[25:1]
[0]
EF_STREAM_DROP Indicates that the stream associated with the MIC1 node has been
dropped due to the bandwidth of the SDI line being
oversubscribed.
Assertion of the flag triggers an Unsolicited Response.
The flag is cleared when the Stream ID is written to.
PP, April 2011, Rev 3.2
79
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
