AK4492ECB Datasheet, PDF (43/101 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4492]
(2) Register Control Mode (PSN pin = “L”)
(2)-1. Manual Setting Mode (AFSD bit = “0”, ACKS bit = “0”)
MCLK frequency is detected automatically and the sampling speed is set by DFS[2:0] bits (Table 11). The
MCLK frequency corresponding to each sampling speed that should be provided externally (Table 12,
Table 13). The AK4492 is set to Manual Setting Mode at power-up (PDN pin = “L” →“H”). When DFS2-0
bits are changed, the AK4492 should be reset by RSTN bit.
Table 11. Sampling Speed (Manual Setting Mode @Register Control Mode)
DFS2 DFS1 DFS0
bit
bit
bit
Sampling Rate (fs)
0
0
0
Normal Speed Mode
8 kHz  54 kHz (default)
0
0
1
Double Speed Mode 54 kHz  108 kHz
0
1
0
Quad Speed Mode 120 kHz  216 kHz
0
1
1
Quad Speed Mode 120 kHz  216 kHz
1
0
0
Oct Speed Mode
384 kHz
1
0
1
Hex Speed Mode
768 kHz
1
1
0
Oct Speed Mode
384 kHz
1
1
1
Hex Speed Mode
768 kHz
Table 12. System Clock Example 1 (Manual Setting Mode @Register Control Mode)
LRCK
MCLK (MHz)
Sampling
Fs
16fs
32fs
48fs
64fs
96fs
128fs
Speed
32.0 kHz
N/A
N/A
N/A
N/A
N/A
N/A
44.1 kHz
N/A
N/A
N/A
N/A
N/A
N/A
Normal
48.0 kHz
N/A
N/A
N/A
N/A
N/A
N/A
88.2 kHz
N/A
96.0 kHz
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Double
176.4 kHz
N/A
192.0 kHz
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
22.5792
24.5760
Quad
384 kHz
N/A
12.288 18.432 24.576 36.864
N/A
Oct
768 kHz 12.288 24.576 36.864 49.152
N/A
N/A
Hex
(N/A: Not available)
Table 13. System Clock Example 2 (Manual Setting Mode @Register Control Mode)
LRCK
MCLK (MHz)
Sampling
fs
192fs 256fs 384fs 512fs 768fs 1024fs 1152fs Speed
32.0 kHz
N/A
8.1920 12.2880 16.3840 24.5760 32.7680 36.8640
44.1 kHz
N/A 11.2896 16.9344 22.5792 33.8688 N/A
N/A
Normal
48.0 kHz
N/A 12.2880 18.4320 24.5760 36.8640 N/A
N/A
88.2 kHz
96.0 kHz
N/A 22.5792 33.8688 45.1584 N/A
N/A 24.5760 36.8640 49.1520 N/A
N/A
N/A
N/A
N/A
Double
176.4 kHz 33.8688 45.1584 N/A
N/A
N/A
N/A
N/A
192.0 kHz 36.8640 49.1520 N/A
N/A
N/A
N/A
N/A
Quad
384 kHz
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Oct
768 kHz
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Hex
(N/A: Not available)
016011073-E-00
- 43 -
2016/12