AK4564 Datasheet, PDF (38/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
Filter Select 2
Addr
Register Name
05H Filter Select 2
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
LPF2D LPF2-1 LPF2-0 LPF1-1 LPF1-0
0
0
0
0
0
0
0
0
LPF1: Select cut-off frequency of LPF1 to revise frequency response. This is 1^st order and IIR filter.
LPF1-1
LPF1-0
Cut-off Frequency
fs=32kHz fs=48kHz
0
0
OFF
OFF
0
1
6kHz
6kHz
1
0
9kHz
9kHz
1
1
13.5kHz 13.5kHz
Table 12. Select cut-off frequency of LPF1
Default
LPF2: Select cut-off frequency of LPF2 to revise frequency response. This is 1^st order and IIR filter.
LPF2D: Enable LPF2
0: OFF (Default)
1: LPF2 ON
LPF2-1
LPF2-0
Cut-off Frequency
fs=32kHz fs=48kHz
0
0
3kHz
3kHz
0
1
4.5kHz
4.5kHz
1
0
6.75kHz 6.75kHz
1
1
10.125kHz 10.125kHz
Table 13. Select cut-off frequency of LPF2
Default
MS0140-E-01
- 38 -
2002/07