alc272 Realtek Semiconductor Corporation, alc272 Datasheet - Page 31

• Manufacturer Part Number: alc272
• Description: 4 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

7.4.2.
There are two types of response from the codec to the controller. Solicited Responses are returned by the
codec in response to a current command verb. The codec will send Solicited Response data in the next
frame, without regard to the Set (Write) or Get (Read) command. The 32-bit response is interpreted by
software, opaque to the controller.
Unsolicited Responses are sent by the codec independently of software requests. Jack Detection or GPI
status information can be actively delivered to the controller and interpreted by software. The ‘Tag’ in
Bit[31:28] is used to identify unsolicited events. This tag is undefined in the HDA specifications.
7.4.3.
This new reset is created by sending two Function Group resets back to back. This Function Group
‘Double’ reset shall do a full initialization and reset all settings to their power on defaults. A Double reset
is defined as two Function Group Reset verbs received without any other intervening valid verbs. The
reset verbs are not required to be received in sequential frames, but there must not be any other verbs
received in frames between the receipt of the Function Group Reset verbs. It is allowed that there are
several null commands received in frames between Function Group Reset verbs.
4 Channel High Definition Audio Codec
Bit [35]
Valid
Bit [35]
Valid
Response Format
Double Function Reset
Unsol=1
Bit [34]
Table 15. Unsolicited Response Format
Table 14. Solicited Response Format
Unsol=0
Bit [34]
Bit [33:32]
Reserved
23
Bit [33:32]
Reserved
Bit [31:28]
Tag
Track ID: JATR-1076-21
Bit [31:0]
Response
Bit [27:0]
Response
Datasheet
ALC272
Rev. 1.0