AK4492ECB Datasheet, PDF (45/101 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4492]
(2)-3. Sampling Frequency (FS) Auto Detect Mode (AFSD bi = “1”)
MCLK frequency and the sampling rate is detected automatically (Table 14). 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 18, Table 19). Internal operation sequence in FS auto detect mode is
shown in Figure 24.
LRCK
fs
16fs
32.0 kHz
N/A
44.1 kHz
N/A
48.0 kHz
N/A
88.2 kHz
N/A
96.0 kHz
N/A
176.4 kHz
N/A
192.0 kHz
N/A
384 kHz
N/A
768 kHz 12.288
(N/A: Not available)
Table 18. System Clock Example 1 @PCM Mode
MCLK(MHz)
32fs
48fs
64fs
96fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
12.288 18.432 24.576 36.864
24.576 36.864 49.152
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
Oct
Hex
LRCK
fs
192fs
32.0 kHz
N/A
44.1 kHz
N/A
48.0 kHz
N/A
88.2 kHz
N/A
96.0 kHz
N/A
176.4 kHz 33.8688
192.0 kHz 36.8640
384 kHz
N/A
768 kHz
N/A
(N/A: Not available)
Table 19. System Clock Example 2 @PCM Mode
MCLK (MHz)
256fs 384fs 512fs 768fs 1024fs
8.1920 12.2880 16.3840 24.5760 32.768
11.2896 16.9344 22.5792 33.8688 N/A
12.2880 18.4320 24.5760 36.8640 N/A
22.5792 33.8688 45.1584 N/A
N/A
24.5760 36.8640 49.1520 N/A
N/A
45.1584 N/A
N/A
N/A
N/A
49.1520 N/A
N/A
N/A
N/A
N/A
N/A
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
Oct
Hex
016011073-E-00
- 45 -
2016/12