AK4951AEN Datasheet, PDF (84/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
Addr
1CH
Register Name
Digital Filter Select 2
R/W
Default
D7
D6
D5
D4
D3
GN1
GN0
EQ0
FIL3
0
R/W
R/W
R/W
R/W
R
0
0
0
0
0
D2
D1
D0
0
LPF
HPF
R
R/W
R/W
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.
FIL3: FIL3 (Stereo Emphasis Filter) Coefficient Setting Enable
0: Disable (default)
1: Enable
When FIL3 bit = “1”, the settings of F3A13-0 and F3B13-0 bits are enabled. When FIL3 bit = “0”, FIL3
block is OFF (MUTE).
EQ0: EQ0 (Gain Compensation Filter) Coefficient Setting Enable
0: OFF (default)
1: ON
When EQ0 bit = “1”, the settings of E0A15-0, E0B13-0 and E0C15-0 bits are enabled. When EQ0 bit
= “0”, the audio data passes the EQ0 block by 0dB gain.
GN1-0: Gain Setting of the Gain Block (Table 31)
Default: “00” (0dB)
Addr
1DH
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 48)
Default: 00 (SDTI)
PFVOL1-0: Sidetone Digital Volume (Table 47)
Default: 00 (0dB)
016001936-E-00
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2016/03