[AK4679]
■ MIC Gain Amplifier
The AK4679 has a gain amplifier for microphone input. The gain of MIC-Amp Lch and Rch is independently selected by
the MGNL3-0 and MGNR3-0 bits (Table 21).
MGNL3
MGNL2
MGNL1
MGNL0
Mode
/MGNR3
/MGNR2
/MGNR1
/MGNR0
Input Gain
bits
bits
bits
bits
0
1
0
0
0
0
0
0
0
1
N/A
N/A
2
0
0
1
0
N/A
3
4
5
0
0
0
0
1
1
1
0
0
1
0
1
−6dB
−3dB
0dB
(default)
6
7
8
9
10
11
12
13
14
15
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
+3dB
+6dB
+9dB
+12dB
+15dB
+18dB
+21dB
+24dB
N/A
1
1
1
1
1
1
0
1
N/A
Table 21. Mic Input Gain (N/A: Not available)
MS1402-E-06
2013/02
- 62 -