alc272 Realtek Semiconductor Corporation, alc272 Datasheet - Page 50

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

8.10. Verb – Set Processing Coefficient (Verb ID=4h)
8.11. Verb – Get Amplifier Gain (Verb ID=Bh)
This verb is used to get gain/attenuation settings from each widget.
4 Channel High Definition Audio Codec
Set Command Format
Codec Response for All NID
Get Command Format
‘Get’ Payload in Command Bit[15:0]
Codec Response for 02h (LOUT1 DAC), 03h (LOUT2 DAC)
Bit [31:28]
Bit [31:28]
CAd=X
CAd=X
31:0
12:4
31:8
3:0
6:0
Bit
Bit
Bit
15
14
13
7
Description
0’s.
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.
Bit-15 is 0 in ‘Get Amplifier Gain’. Read as 0 (No Input Amplifier Mute).
Bit-15 is 1 in ‘Get Amplifier Gain’. Read as 0 (No Output Amplifier Mute).
Bit-15 is 0 in ‘Get Amplifier Gain’. Read as 0 (No Input Amplifier Gain).
Bit-15 is 1 in ‘Get Amplifier Gain’: Output Amplifier Gain [6:0].
7-bit step value (0~64) specifying the volume from –64B~0dB in 1dB steps.
Node ID=20h
Node ID=Xh
Bit [27:20]
Bit [27:20]
Table 44. Verb – Set Processing Coefficient (Verb ID=4h)
Table 45. Verb – Get Amplifier Gain (Verb ID=Bh)
Verb ID=Bh
Verb ID=4h
Bit [19:16]
Bit [19:16]
‘Get’ payload [15:0]
Payload Bit [15:0]
Payload Bit [15:0]
Coefficient [15:0]
42
1: Output amplifier gain is requested
1: Left amplifier gain is requested
Bit[7:0] are responsible for ‘Get’
Track ID: JATR-1076-21
Codec Response Format
Codec Response Format
Response [31:0]
Response [31:0]
0’s for all nodes
Datasheet
ALC272
Rev. 1.0