alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 50

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

8.12. Verb – Set Amplifier Gain (Verb ID=3h)
This verb is used to set amplifier gain/attenuation in each widget.
2+2 Channel High Definition Audio Codec
Codec Response for NID=23h and 24h (Multiplexer widgets in front of ADCs)
Codec Response to Other NID
Set Command Format
‘Set’ Payload in Command Bit[15:0]
Bit [31:28]
Cad=X
31:8
31:0
11:8
6:0
6:0
Bit
Bit
Bit
15
14
13
12
7
7
Description
0’s.
Payload[15] is 0 in ‘Get Amplifier Gain’: Read as 0 (No Input Amplifier Mute for all index).
Payload[15] is 1 in ‘Get Amplifier Gain’: Output Amplifier Mute. 0:Unmute; 1:Mute (Default=1)
Payload[15] is 0 in ‘Get Amplifier Gain’: Read as 0’s (No Input Amplifier Gain for all index).
Payload[15] is 1 in ‘Get Amplifier Gain’: Output Amplifier Gain [6:0] specifying the volume from –16.5dB
to 30dB in 1.5dB per step (Default=0000001b, -15dB).
Description
Not Supported (returns 00000000h).
Description
Set Output Amp.
1 indicates output amplifier gain will be set.
Set Input Amp.
1 indicates input amplifier gain will be set.
Set Left Amp.
1 indicates left amplifier gain will be set.
Set Right Amp.
1 indicates right amplifier gain will be set.
Index Offset (for input amplifiers on Sum widgets and Selector Widgets).
5 bits index offset in connection list is used to select which input gain will be set on a mixer or a
multiplexer widget. The index is ignored if the node is not a mixer or a multiplexer widget, or the ‘Set Input
Amp’ bit is not set.
Mute.
0: Unmute
1: Mute (-∞gain)
Gain[6:0].
A 7-bit step value specifying the amplifier gain.
Node ID=Xh
Bit [27:20]
Table 44. Verb – Set Amplifier Gain (Verb ID=3h)
Verb ID=3h
Bit [19:8]
‘Set’ payload [7:0]
Payload Bit [7:0]
42
Track ID: JATR-1076-21
Codec Response Format
Response [31:0]
0’s for all nodes
ALC268 Series
Datasheet
Rev. 1.3