AK4955 Datasheet, PDF (40/117 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP

[AK4955]
Mode
ADCPF bit PFDAC bit PFSDO bit
Recording Mode 1
1
0
1
Playback Mode 1
0
1
0
Recording Mode 2
1
0
1
Playback Mode 2
0
1
0
Recording Mode 3 & Playback Mode 3
x
0
0
Loopback 1
1
1
1
Loopback 2
1
1
1
Table 24. Recording Playback Mode (x: Don’t care)
When changing those modes, PMPFIL bit must be “0”.
DSPBP bit
0
0
1
1
x
0
1
Figure
Figure 35
Figure 36
Figure 37
Figure 38
Figure 39
Figure 40
Figure 41
ADC
1st Order
HPF1
DSP
1st Order
1st Order
Stereo
Gain
4 Band
ALC
1 Band
HPF3
LPF
Separation
Compensation
EQ
(Volume)
EQ
DSP
DAC
DEM
Mono
SMUTE
DVOL
Figure 35. The Path in Recording Mode 1
ADC
1st Order
HPF1
ALC
(Volume)
4 Band
EQ
Gain
Compensation
Stereo
Separation
1st Order
LPF
1st Order
HPF3
DSP
DAC
DEM
Mono
SMUTE
DVOL
DSP
Figure 36. The Path in Playback Mode 1
1 Band
EQ
MS1343-E-00
- 40 -
2011/12