AK4679EG Datasheet, PDF (86/220 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with DSP and MIC/RCV/HP/SPK/LINE-AMP

[AK4679]
NSTHL4-0 bits
Noise Suppression
Threshold Low Level [dB]
Step
00H
−36.0
01H
−37.5
02H
−39.0
:
:
1.5dB
10H
−60.0
:
:
1EH
−81.0
1FH
−82.5
Table 43. 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 44. 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
44.1kHz
0
0
1.1dB/s
2.1dB/s
5.8dB/s
0
1
2.1dB/s
4.2dB/s
11.7dB/s
1
0
4.2dB/s
8.5dB/s
23.4dB/s
1
1
8.5dB/s
17.0dB/s
46.8dB/s
0
0
17.0dB/s
33.9dB/s
93.5dB/s
0
1
33.9dB/s
67.9dB/s 187.1dB/s
1
0
1
1
N/A
Table 45. Noise Suppression ATT Speed Setting (N/A: Not available)
(default)
MS1402-E-06
- 86 -
2013/02