alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 66

• Manufacturer Part Number: alc268
• Description: 2+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

8.40. Get/Set Volume Knob Widget (Verb ID=F0Fh/70Fh)
8.41. Get/Set Subsystem ID [31:0]
2+2 Channel High Definition Audio Codec
Get Command Format
Codec Response for Volume Knob Widget
Note: The ALC268 does not support volume knob widget will ignore this verb and respond with 0’s.
Set Command Format (Verb ID=70Fh)
‘Payload’ in Set Command for Volume Knob Widget
Note: The ALC268 does not support volume knob widget will ignore this verb and respond with 0’s.
Get Command Format
Codec Response for NID=01h (Audio Function Group)
Bit [31:28]
Bit [31:28]
Bit [31:28]
Cad=X
Cad=X
Cad=X
31:16
31:8
31:8
15:8
6:0
6:0
7:0
Bit
Bit
Bit
7
7
(Verb ID=F20h / 723h~720h to Set Bit[31:0])
Table 73. Get/Set Subsystem ID [31:0] (Verb ID=F20h / 723h~720h to Set Bit[31:0])
Description
Reserved.
Direct.
0: The volume generated by an external HW volume control will be sent by unsolicited response. Software
is responsible for programming the amplifier appropriately
1: The volume generated by an external HW volume control will directly affect amplifier volume
Volume in Steps.
Description
Reserved.
Direct.
0: The volume generated by an external HW volume control will be sent by unsolicited response. Software
is responsible for programming the amplifier appropriately
1: The volume generated by an external HW volume control will directly affect amplifier volume
Reserved.
Description
Subsystem ID[23:8] (Default=10Ech).
Subsystem ID[7:0] (Default=02h).
Assembly ID[7:0] (Default=68h).
Node ID=Xh
Node ID=Xh
Node ID=Xh
Bit [27:20]
Bit [27:20]
Bit [27:20]
Table 72. Get/Set Volume Knob Widget (Verb ID=F0Fh/70Fh)
Verb ID=F0Fh
Verb ID=70Fh
Verb ID=F20h
Bit [19:8]
Bit [19:8]
Bit [19:8]
Bit[7] is ‘Direct’ control
Payload Bit [7:0]
Payload Bit [7:0]
Payload Bit [7:0]
58
0’s
0’s
Bit[31:8]=0’s, Bit[7:0] is volume
Track ID: JATR-1076-21
Codec Response Format
Codec Response Format
Codec Response Format
Response [31:0]
Response [31:0]
Response [31:0]
32 bits response
0’s
ALC268 Series
Datasheet
Rev. 1.3