AK4490EN Datasheet, PDF (56/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490EN]
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).
DFS2-0: Sampling Speed Control (Table 31)
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
Table 31. Sampling Speed (Manual Setting Mode @Serial Mode)
DFS1 DFS0
Sampling Rate (fs)
0
0
Normal Speed Mode
30kHz  54kHz
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
-
(default)
SD: Minimum delay Filter Enable
0: Traditional filter
1: Short delay filter (default)
SSLOW bit
0
0
0
0
1
SD bit
0
0
1
1
-
Table 32. Digital Filter Setting
SLOW bit
Mode
0
Sharp roll-off filter
1
Slow roll-off filter
0
Short delay Sharp roll-off filter
1
Short delay Slow roll-off filter
-
Super Slow roll-off filter
(default)
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”.
015013666-E-01
- 56 -
2015/12