AK4695 Datasheet, PDF (49/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
NSTHL4-0 bits
Noise Suppression
Threshold Low Level [dB]
Step
00H
36.0
01H
37.5
02H
39.0
:
10H
:
60.0
1.5dB
:
:
1EH
81.0
1FH
82.5
Table 41.Noise Suppression Threshold Low Level
(default)
NSREF3-0 bits GAIN [dB]
Step
0H
9
(default)
1H
12
2H
15
:
:
AH
BH
39
42
3dB
CH
45
DH
48
EH
51
FH
54
Table 42. Reference Value Setting when Noise Suppression is ON
NSATT2
bit
0
0
0
0
1
1
1
1
NSATT1 NSATT0
bit
bit
8kHz
ATT Speed
16kHz
48 kHz
0
0
1.1dB/s
2.1dB/s
6.4dB/s
0
1
2.1dB/s
4.2dB/s
12.7dB/s
1
0
4.2dB/s
8.5dB/s
25.4dB/s
1
1
8.5dB/s
17.0dB/s
50.9dB/s
0
0
17.0dB/s
33.9dB/s
101.8dB/s
0
1
33.9dB/s
67.9dB/s
203.6dB/s
1
0
1
1
N/A
Table 43. Noise Suppression ATT Speed Setting (N/A: Not available)
(default)
MS1463-E-01
- 49 -
2014/12