AK4497 Datasheet, PDF (41/98 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4497]
1-3. Sampling Frequency (FS) Auto Detect Mode (AFSD bit=”1”)
MCLK frequency and the sampling rate is detected automatically (Table 13). In this mode, DFS[2:0] bits
and ACKS bit settings are invalid. The MCLK frequency corresponding to each sampling speed should
be provided externally (Table 17, Table 18). Internal operation sequence in FS auto detect mode is
shown in Figure 21.
LRCK
Fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
384kHz
768kHz
Table 17. System Clock Example @PCM Mode
MCLK(MHz)
16fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
12.288
32fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
12.288
24.576
48fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
18.432
36.864
64fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24.576
49.152
96fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
36.864
N/A
128fs
N/A
N/A
N/A
N/A
N/A
22.5792
24.5760
N/A
N/A
Sampling
Speed
Normal
Double
Quad
Quad
Oct
Hex
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
384kHz
768kHz
192fs
N/A
N/A
N/A
N/A
N/A
33.8688
36.8640
N/A
N/A
Table 18. System Clock Example @PCM Mode
MCLK(MHz)
256fs
8.1920
11.2896
12.2880
22.5792
24.5760
45.1584
49.152
N/A
N/A
384fs
12.2880
16.9344
18.4320
33.8688
36.8640
N/A
N/A
N/A
N/A
512fs
16.3840
22.5792
24.5760
45.1584
49.152
N/A
N/A
N/A
N/A
768fs
24.5760
33.8688
36.8640
N/A
N/A
N/A
N/A
N/A
N/A
1024fs
32.768
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1152fs
36.8640
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Sampling
Speed
Normal
Double
Quad
Quad
Oct
Hex
Rev. 0.1
- 41 -
2015/11