AK4951AEN Datasheet, PDF (41/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
Table 26. Recording Playback Mode Example
Mode Example
ADCPF PFDAC1-0 PFSDO
bit
bits
bit
Recording Mode 1 & Playback Mode 2
1
00
1
Recording Mode 2 & Playback Mode 1
0
01
0
Recording Mode 2 & Playback Mode 2
(Programmable Filter Bypass Mode:
x
00
0
PMPFIL bit = “0”)
Loopback Mode
1
01
1
(x: Do not care)
Figure
Figure 31 (default)
Figure 32
Figure 33
Figure 34
When changing those modes, PMPFIL bit must be “0”.
ADC
1st Order
HPF1
MIC
Sensitivity
Correction
Auto Wind
Noise
Reduction
1st Order
HPF2
1st Order
LPF
Stereo
Emphasis
Gain
Compensation
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
DVOL/
SMUTE
Mono/Stereo
Select
Figure 31. The Path in Recording Mode 1 & Playback Mode 2 (default)
ADC
1st Order
HPF1
DAC
DVOL/
SMUTE
Mono/Stereo
Select
1 Band
EQ
ALC
(Volume)
4 Band
EQ
Gain
Stereo
Compensation Emphasis
1st Order
LPF
Figure 32. The Path in Recording Mode 2 & Playback Mode 1
1st Order
HPF2
ADC
1st Order
HPF1
DAC
DVOL/
SMUTE
Mono/Stereo
Select
Figure 33. The Path in Recording Mode 2 & Playback Mode 2
ADC
1st Order MIC Sensitivity
HPF1
Correction
Auto Wind Noise 1st Order
Reduction Filter HPF2
1st Order
LPF
Stereo
Emphasis
Gain
Compensation
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
DVOL/
SMUTE
Mono/Stereo
Select
PFVOL
Figure 34. The Path in Loopback Mode
016001936-E-00
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2016/03