AK4637 Datasheet, PDF (44/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC - SPK-AMP

[AK4637]
Mode Example
ADCPF PFDAC1-0 PFSDO
bit
bits
bit
Figure
Recording Mode 1 & Playback Mode 2
1
00
1
Figure 40
Recording Mode 2 & Playback Mode 1
0
01
0
Figure 41
Recording Mode 2 & Playback Mode 2
(Programmable Filter Bypass Mode:
x
00
0
Figure 42
PMPFIL bit = “0”)
Loopback Mode
1
01
1
Figure 43
Table 24. Recording Playback Mode Example (x: Don’t care)
(default)
When changing those modes, PMPFIL bit must be “0”.
ADC
1st Order
HPF1
1st Order
HPF2
1st Order
LPF
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
DVOL/
SMUTE
Figure 40. The Path in Recording Mode 1 & Playback Mode 2 (default)
ADC
1st Order
HPF1
DAC
DVOL/
SMUTE
1 Band
EQ
ALC
(Volume)
4 Band
EQ
1st Order
LPF
1st Order
HPF2
Figure 41. The Path in Recording Mode 2 & Playback Mode 1
ADC
1st Order
HPF1
DAC
DVOL/
SMUTE
Figure 42. The Path in Recording Mode 2 & Playback Mode 2
ADC
1st Order
HPF1
1st Order
HPF2
1st Order
LPF
4 Band
EQ
ALC
(Volume)
1 Band
EQ
DAC
DVOL/
SMUTE
Figure 43. The Path in Loopback Mode
015010680-E-00
- 44 -
2015/09