AK4497 Datasheet, PDF (39/98 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4497]
(2) Register Control Mode (PSN pin = “L”)
1-1. 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 10). The
MCLK frequency corresponding to each sampling speed that should be provided externally (Table 11).
The AK4497 is set to Manual Setting Mode at power-up (PDN pin = “L” →“H”). When DFS2-0 bits are
changed, the AK4497 should be reset by RSTN bit.
Table 10. Sampling Speed (Manual Setting Mode @Register Control Mode)
DFS2 DFS1 DFS0
Sampling Rate (fs)
0
0
0 Normal Speed Mode
8kHz  54kHz (default)
0
0
1
Double Speed Mode 54kHz  108kHz
0
1
0
Quad Speed Mode 120kHz  216kHz
0
1
1
Quad Speed Mode 120kHz  216kHz
1
0
0
Oct Speed Mode
384kHz
1
0
1
Hex Speed Mode
768kHz
1
1
0
Oct Speed Mode
384kHz
1
1
1
Hex Speed Mode
768kHz
Table 11. System Clock Example (Manual Setting Mode @Register Control Mode)
LRCK
MCLK(MHz)
Sampling
Speed
Fs
16fs 32fs 48fs 64fs 96fs 128fs
32.0kHz N/A
N/A
N/A
N/A
N/A
N/A Normal
44.1kHz N/A
N/A
N/A
N/A
N/A
N/A
48.0kHz N/A
N/A
N/A
N/A
N/A
N/A
88.2kHz N/A
N/A
N/A
N/A
N/A
N/A Double
96.0kHz N/A
N/A
N/A
N/A
N/A
N/A
176.4kHz N/A
N/A
N/A
N/A
N/A 22.5792 Quad
192.0kHz N/A
N/A
N/A
N/A
N/A 24.5760 Quad
384kHz
N/A 12.288 18.432 24.576 36.864
N/A
Oct
768kHz ^{12.288 24.576 36.864 49.152 N/A}
N/A
Hex
Table 12. System Clock Example (Manual Setting Mode @Register Control Mode)
LRCK
MCLK(MHz)
Sampling
Speed
fs
192fs 256fs 384fs 512fs 768fs 1024fs 1152fs
32.0kHz
N/A
8.1920 12.2880 16.3840 24.5760 32.7680 36.8640 Normal
44.1kHz N/A 11.2896 16.9344 22.5792 33.8688
N/A
N/A
48.0kHz N/A 12.2880 18.4320 24.5760 36.8640
N/A
N/A
88.2kHz N/A 22.5792 33.8688 45.1584
N/A
N/A
N/A Double
96.0kHz N/A 24.5760 36.8640 49.152
N/A
N/A
N/A
176.4kHz 33.8688 45.1584
N/A
N/A
N/A
N/A
N/A
Quad
192.0kHz 36.8640 49.152
N/A
N/A
N/A
N/A
N/A
Quad
384kHz N/A
N/A
N/A
N/A
N/A
N/A
N/A
Oct
768kHz N/A
N/A
N/A
N/A
N/A
N/A
N/A
Hex
Rev. 0.1
- 39 -
2015/11