AK4649 Datasheet, PDF (77/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
Addr Register Name
D7
D6
D5
D4
D3
D2
28H BEEP/HPF Mode
HPFC1 HPFC0
0
0
0
0
R/W
R/W
R\/W
R
R
R
R
Default
0
0
0
0
0
0
BPM: BEEP Mode Setting (Table 48)
Default: “0”: External Resistance Mode
HPFC1-0: Cut-off Frequency Setting of HPF1 (ADC) (Table 46)
Default: “00” (3.4Hz @ fs = 44.1kHz)
D1
D0
0
BPM
R
R/W
0
0
Addr Register Name
D7
D6
D5
D4
D3
D2
D1
D0
29H Noise Suppression 1
0
NSCE NSTHH1 NSTHH0 NSTHL3 NSTHL2 NSTHL1 NSTHL0
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
1
0
0
0
0
NSTHL3-0: Noise Suppression Threshold Low Level Setting (Table 36)
Default: “0000” (-81dBFS)
NSTHH1-0: Noise Suppression Threshold High Level Setting (Table 38)
Default: “01” (NSTHL3-0 bits + 6dB)
NSCE: Noise Suppression Enable
0: Disable (default)
1: Enable
Addr Register Name
D7
D6
D5
D4
D3
D2
2AH Noise Suppression 2
0
0
NATT1 NATT0
0
0
R/W
R
R
R/W
R/W
R
R
Default
0
0
0
1
0
0
NSGAIN1-0: ALC First Recovery Speed Setting after Noise Suppression (Table 39)
Default: “01” (8 step)
NATT1-0: Noise Attenuate Step Setting (Table 37)
Default: “01” (1/2 step)
D1
NSGAIN1
R/W
0
D0
NSGAIN0
R/W
1
Addr
2BH
Register Name
Noise Suppression 3
R/W
Default
D7
NSREF7
R/W
1
D6
NSREF6
R/W
0
D5
NSREF5
R/W
0
D4
NSREF4
R/W
1
D3
NSREF3
R/W
0
D2
NSREF2
R/W
0
D1
NSREF1
R/W
0
D0
NSREF0
R/W
1
NSREF7-0: Reference Level Setting at Noise Suppression
0.375dB step, 242 Level (Table 40)
Default: “91H” (0dB)
MS1023-E-01
- 77 -
2010/08