AK4490 Datasheet, PDF (55/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490]
Addr Register Name
01H Control 2
R(I2C)/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
DZFE DZFM
SD
DFS1
DFS0
DEM1 DEM0 SMUTE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
1
0
0
0
1
0
SMUTE: Soft Mute Enable
0: Normal Operation (default)
1: DAC outputs soft-muted.
DEM1-0: De-emphasis Response
Initial value is “01” (OFF).
DFS1-0: Sampling Speed Control (Table 9)
Initial value is “000” (Normal Speed). Click noise occurs when DFS2-0 bits are changed.
(05H, D1: DFS2 bit )
DFS2
0
0
0
0
1
1
1
1
DFS1 DFS0
Sampling Rate (fs)
0
0
Normal Speed Mode 30kHz  54kHz (default)
0
1
Double Speed Mode 54kHz  108kHz
1
0
Quad Speed Mode
120kHz 
216kHz
1
1
Reserved
-
0
0
Oct Speed Mode
384kHz
0
1
Hex Speed Mode
768kHz
1
0
Reserved
-
1
1
Reserved
-
Table 9. Sampling Speed (Manual Setting Mode @Serial Mode)
SD: Minimum delay Filter Enable
0: Traditional filter
1: Short delay filter (default)
SD
SLOW
Mode
0
0
Sharp roll-off filter
0
1
Slow roll-off filter
1
0
Short delay sharp roll off filter (default)
1
1
Short delay slow roll off filter
Table 14. Digital Filter Setting
DZFM:
Data Zero Detect Mode
0: Channel Separated Mode (default)
1: Channel ANDed Mode
If the DZFM bit is set to “1”, the DZF pins of both L and R channels go to “H” only when the
input data at both channels are continuously zeros for 8192 LRCK cycles.
DZFE:
Data Zero Detect Enable
0: Disable (default)
1: Enable
Zero detect function can be disabled by DZFE bit “0”. In this case, the DZF pins of both channels
are always “L”.
MS1648-E-03
- 55 -
2014/11