alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 47

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

8.11. Verb – Get Amplifier Gain (Verb ID=Bh)
This verb is used to get gain/attenuation settings from each widget.
2+2 Channel High Definition Audio Codec
Get Command Format
‘Get’ Payload in Command Bit[15:0]
Codec Response for NID=02h (LOUT1 DAC) and 03h (LOUT2 DAC)
Codec Response for NID=0Eh (MONO Sum Widgets)
Bit [31:28]
Cad=X
12:4
31:8
31:8
3:0
6:0
6:0
Bit
Bit
Bit
15
14
13
7
7
Description
Get Input/Output.
0: Input amplifier gain is requested
Reserved. Read as 0.
Get Left/Right.
0: Right amplifier gain is requested
Reserved. Read as 0’s.
Index[3:0] for Input Source.
Select amplifier for this converter. If a widget has no multiple input sources, the index will be ignored.
Description
0’s.
Payload[15] is 0 in ‘Get Amplifier Gain’: Read as 0 (No Output Amplifier Mute).
Payload[15] is 1 in ‘Get Amplifier Gain’: Read as 0 (No Output Amplifier Mute).
Payload[15] is 0 in ‘Get Amplifier Gain’: Read as 0’s (No Input Amplifier Gain).
Payload[15] is 1 in ‘Get Amplifier Gain’: 6-bit control specifying the volume from–64dB~ 0dB in 1dB
step.
Description
0’s.
Payload[15] is 0 in ‘Get Amplifier Gain’: Input Amplifier Mute. 0: Unmute; 1: Mute
Payload[15] is 1 in ‘Get Amplifier Gain’: Read as 0 (No Output Amplifier Mute).
Payload[15] is 0 in ‘Get Amplifier Gain’: Read as 0’s (No Input Amplifier Gain).
Payload[15] is 1 in ‘Get Amplifier Gain’: Read as 4 (No Output Amplifier Gain).
Node ID=Xh
Bit [27:20]
LOUT2 DAC (NID=03h)
LOUT1 DAC(NID=02h)
MONO Sum (NID=0Eh)
Node
Node
Table 43. Verb – Get Amplifier Gain (Verb ID=Bh)
Verb ID=Bh
Bit [19:16]
‘Get’ payload [15:0]
Payload Bit [15:0]
Index[3:0]=0 (from LOUT1)
1000000b=40h (0dB)
1000000b=40h (0dB)
Gain[6:0] (Default)
Default of Bit [7]
39
0 (Unmute)
1: Output amplifier gain is requested
1: Left amplifier gain is requested
Bit[7:0] are responsible for ‘Get’
Track ID: JATR-1076-21
–64dB~0dB in 1dB step
–64dB~0dB in 1dB step
Codec Response Format
Index[3:0]=Other
Response [31:0]
Gain Range
0
ALC268 Series
Datasheet
Rev. 1.3