alc658 Realtek Semiconductor Corporation, alc658 Datasheet - Page 13

• Manufacturer Part Number: alc658
• Description: Six-channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

X = Reserved bit
*: MX36 is the master volume control of CENTER/LFE output.
6.1.1.
Default: 0180H
Writing any value to this register will start a register reset and cause all of the registers to revert to their default values.
Reading this register returns the ID code of the specific part.
Note: Writing any data into this register will reset all mixer registers to their default value. The written data is ignored.
6.1.2.
Default: 8000H
These registers control the volume level of Front-Out. Each step on the left and right channels corresponds to a 1.5dB
increase/decrease in volume.
Six-Channel AC’97 2.3 Audio Codec
For MR/ML:
(hex)
Reg.
MX38 is the master volume control of surround output.
7Ah
7Ch
7Eh
15:10
13:8
Bit
7:6
5:0
Bit
9
8
7
6
5
4
3
2
1
0
15
14
Vendor ID1
Vendor ID2
Extension
Name
Control
MX00 Reset
MX02 (Front) Master Volume
Type
Type
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
-
-
-
00h
3Fh
D15
0
0
0
Function
Reserved
Read as 0 (Does not support 20-bit ADC)
Read as 1 (Supports 18-bit ADC)
Read as 1 (Supports 20-bit DAC)
Read as 0 (Does not support 18-bit DAC)
Read as 0 (No Loudness support)
Read as 0 (No True Line Level output support)
Read as 0 (No simulated stereo for analog 3D block use)
Read as 0 (No Bass & Treble Control)
Read as 0 (No Modem Line support)
Read as 0 (No Dedicated Mic PCM input channel)
Function
Mute Control 0: Normal
Reserved
Master Left Volume (ML[5:0]) in 1.5 dB steps
Reserved
Master Right Volume (MR[5:0]) in 1.5 dB steps
D14 D13 D12 D11 D10 D9
0
1
1
0 dB attenuation
94.5 dB attenuation
0
0
0
0
0
0
Table 7. MX02 (Front) Master Volume
0
0
0
Table 6. MX00 Reset
1: Mute (-∞ dB)
0
0
1
0
0
1
9
D8
0
1
1
D7
0
0
1
D6
0
1
0
D5
0
0
0
D4
0
0
0
D3
0
1
0
D2
0
1
0
D1
0
0
0
D0
0
0
0
Datasheet
ALC658
Default
Rev. 1.3
60A2h
414Ch
4780h