AK4950 Datasheet, PDF (40/106 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP

[AK4950]
Mode
ADCPF bit PFDAC bit
Recording Mode 1
1
0
Playback Mode 1
0
1
Recording Mode 2 & Playback Mode 2
x
0
Loopback Mode
1
1
Table 25. Recording Playback Mode (x: Don’t care)
When changing those modes, PMPFIL bit must be “0”.
PFSDO bit
1
0
0
1
Figure
Figure 33
Figure 34
Figure 35
Figure 36
ADC
1st Order
MIC Sensitivity
1st Order
1st Order
Stereo
Gain
3 Band
HPF1
Correction
HPF2
LPF
Separation
Compensation
EQ
ALC
(Volume)
1 Band
EQ
DAC
DEM
Mono
SMUTE
DVOL
ADC
1st Order
HPF1
Figure 33. The Path in Recording Mode 1 (default)
DAC
ADC
DEM
Mono
SMUTE DVOL
1 Band
EQ
ALC
(Volume)
3 Band
EQ
Gain
Compensation
Stereo
Separation
Figure 34. The Path in Playback Mode 1
1st Order
LPF
1st Order
HPF2
1st Order
HPF1
DAC
DEM
Mono SMUTE DVOL
Figure 35. The Path in Recording Mode 2 & Playback Mode 2
ADC
1st Order
HPF1
MIC Sensitivity
Correction
1st Order
HPF2
1st Order
LPF
Stereo
Separation
Gain
Compensation
3 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
DEM
Mono
SMUTE
DVOL
Figure 36. The Path in Loopback Mode
MS1320-E-00
- 40 -
2011/10