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