AK4637EN Datasheet, PDF (78/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
Addr Register Name
D7
D6
D5
D4
D3
D2
D1
D0
16H Digital Filter Select 1
0
0
0
0
0
HPFC1 HPFC0 HPFAD
R/W
R
R
R
R
R
R/W
R/W
R/W
Default
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 PMADC bit = “1”, set HPFAD bit to “1”.
HPFC1-0: Cut-off Frequency Setting of HPF1 (ADC) (Table 25)
Default: “00” (3.7Hz @ fs = 48kHz)
Addr Register Name
D7
D6
D5
D4
D3
D2
D1
D0
17H Digital Filter Select 2
0
0
0
0
0
0
LPF
HPF
R/W
R
R
R
R
R
R
R/W
R/W
Default
0
0
0
0
0
0
0
0
HPF: HPF2 Coefficient Setting Enable
0: OFF (default)
1: ON
When HPF bit is “1”, the settings of F1A13-0 and F1B13-0 bits are enabled. When HPF bit is
“0”, the audio data passes the HPF2 block by is 0dB gain.
LPF: LPF Coefficient Setting Enable
0: OFF (default)
1: ON
When LPF bit is “1”, the settings of F2A13-0 and F2B13-0 bits are enabled. When LPF bit is “0”,
the audio data passes the LPF block by 0dB gain.
Addr
18H
Register Name
Digital Filter Mode
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0 PFVOL1 PFVOL0 PFDAC1 PFDAC0 ADCPF PFSDO
R
R
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
1
1
PFSDO: SDTO Output Signal Select
0: ADC (+ 1st order HPF) Output
1: Programmable Filter / ALC Output (default)
ADCPF: Programmable Filter / ALC Input Signal Select
0: SDTI
1: ADC Output (default)
PFDAC1-0: DAC Input Signal Select (Table 42)
Default: 00 (SDTI)
PFVOL1-0: Sidetone Digital Volume (Table 41)
Default: 00 (0dB)
015010680-E-00
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2015/09