alc250-lf Realtek Semiconductor Corporation, alc250-lf Datasheet - Page 16

• Manufacturer Part Number: alc250-lf
• Description: Two-channel Ac?97 2.3 Audio Codec With Equalizer
• Manufacturer: Realtek Semiconductor Corporation

6.1.12 MX1A Record Select
Default: 0000h
Register 1Ah controls the record input source. Each bit in bits 2:0 selects a recording source for the right channel. Each bit in bits
10:8 selects a recording source for the left channel.
6.1.13 MX1C Record Gain for Stereo ADC
Default: 8000h
Register 1Ch controls the record gain. Each step in bits 3:0 correspond to 1.5dB in increase/decrease in gain for the right
channel, allowing 16 levels of gain, from 0000 to 1111. Each step in bits 11:8 correspond to 1.5dB in increase/decrease in gain
for the left channel, allowing 16 levels of gain, from 0000 to 1111.
Two-Channel AC’97 2.3 Audio Codec
15:11
14:12
10:8
11:8
Bit
7:3
2:0
Bit
7:4
3:0
15
For LRG/RRG:
For LRS
For RRS
Type
Type
R/W
R/W
R/W
R/W
R/W
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Reserved
Left Record Source Select (LRS[2:0])
Reserved
Right Record Source Select (RRS[2:0])
Mute Control 0: Normal
Reserved
Left Record Gain Select (LRG[3:0]) in 1.5 dB steps
Reserved
Right Record Gain Select (RRG[3:0]) in 1.5 dB steps
MIC
CD LEFT
Muted
AUX LEFT
LINE LEFT
STEREO MIXER OUTPUT LEFT
MONO MIXER OUTPUT
PHONE
MIC
CD RIGHT
Muted
AUX RIGHT
LINE RIGHT
STEREO MIXER OUTPUT RIGHT
MONO MIXER OUTPUT
PHONE
0Fh
00h
+22.5dB
0 dB (No Gain)
1: Mute (-∞ dB)
11
Function
Function
ALC250 DataSheet
Rev1.3