AK4951AEN Datasheet, PDF (83/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
Addr
1AH
Register Name
Auto HPF Control
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0
AHPF SENC2 SENC1 SENC0 STG1 STG0
R
R
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
1
1
0
0
STG1-0: Automatic Wind Noise Reduction Filter Maximum Attenuation Level (Table 30)
Default: “00” (Low)
SENC2-0: Wind Noise Detection Sensitivity (Table 29)
Default: “011” (2.0)
AHPF: Automatic Wind Noise Reduction Filter Control
0: OFF (default)
1: ON
When AHPF bit = “1”, the automatic wind noise reduction filter is enabled. The audio data
passes this block by 0dB gain when AHPF bit = “0”.
Addr
1BH
Register Name
Digital Filter Select 1
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
HPFC1 HPFC0 HPFAD
R
R
R
R
R
R/W
R/W
R/W
0
0
0
0
0
0
0
1
HPFAD: HPF1 Control after ADC
0: OFF
1: ON (default)
When HPFAD bit is “1”, the settings of HPFC1-0 bits are enabled. When HPFAD bit is “0”, the
audio data passes the HPFAD block by 0dB gain.
When PMADL bit = “1” or PMADR bit = “1”, set HPFAD bit to “1”.
HPFC1-0: Cut-off Frequency Setting of HPF1 (ADC) (Table 27)
Default: “00” (3.7Hz @ fs = 48kHz)
016001936-E-00
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2016/03