AK4649 Datasheet, PDF (39/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
Mode
ADCPF bit PFDAC bit
Recording Mode 1
1
0
Playback Mode 1
0
1
Recording Mode 2 & Playback Mode 2
(Programmable Filter Bypass Mode: PMPFIL bit = “0”)
x
0
Loopback Mode
1
1
Table 23. Recording Playback Mode (x: Don’t care)
PFSDO bit
1
0
0
1
Figure
Figure 31
Figure 32
Figure 33
Figure 34
LPF bit, HPF bit, FIL3 bit, EQ0 bit, EQ1 bit, EQ2 bit, EQ3 bit, EQ4 bit, EQ5 bit, ACL1 bit and ALC2 bit must be “0”
when changing those modes.
ADC
1st Order
HPF1
1st Order
HPF2
1st Order
LPF
Stereo
Separation
Gain
Compensation
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
SMUTE DATT
ADC
1st Order
HPF1
Figure 31. Path at Recording Mode 1 (default)
DAC
SMUTE DATT
1 Band
EQ
ALC
(Volume)
4 Band
EQ
Gain
Compensation
Stereo
Separation
1st Order
LPF
1st Order
HPF2
Figure 32. Path at Playback Mode 1
ADC
1st Order
HPF1
DAC
ADC
SMUTE DATT
Figure 33. Path at Recording Mode 2 & Playback Mode 2
1st Order
HPF1
1st Order
HPF2
1st Order
LPF
Stereo
Separation
Gain
Compensation
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
SMUTE DATT
Figure 34. Path at Loopback Mode
MS1023-E-01
- 39 -
2010/08