AK4490EN Datasheet, PDF (59/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490EN]
Addr Register Name
06H Control 5
R(I2C)/W
Default
D7
DDM
R/W
0
D6
DML
R/W
0
D5
DMR
R/W
0
D4
DMC
R/W
0
D3
DMRE
R/W
0
D2
D1
D0
0
DSDD DSDSEL0
R
R/W
R/W
0
0
0
DSDSEL1-0: DSD Sampling Speed Control (See also Control 7 register.)
Table 15. DSD Sampling Speed Control
DSDSEL1 bit DSDSEL0 bit DSD data stream
0
0
2.8224MHz
0
1
5.6448MHz
1
0
11.2896MHz
1
1
Reserved
(default)
DSDD: DSD Play Back Path Control
Table 16. DSD Play Back Mode Control
DSDD
Mode
0
Normal Path (default)
1
Volume Bypass
DMRE:DSD Mute Release
0: Hold (default)
1: Release Mute
This register is only valid when DDM bit = “1” and DMC bit = “1”. When the AK4490EN
mutes DSD data by DDM and DMC bits settings, the mute is released by setting DMRE bit
to “1”.
Table 19. Recovery Method to Normal Operation Mode from Full Scale Detection Status
DDM
DMC
DMRE
Status After Detection
0
*
*
When full scale is detected, Mute function is Disable. (default)
When full scale is detected, Mute function is Enable.
1
0
*
The AK4490EN returns normal operation automatically
by a normal signal input.
When full scale is detected, Mute function is Enable.
1
1
0
The AK4490EN keeps mute mode, even if a normal
signal is input.
1
1
1
(Note 28)
When full scale is detected, Mute function is Enable.
The AK4490EN returns normal operation, when a
normal signal is input and DMRE bit is set “1”.
Note 28. After the AK4490EN returns normal operation, DMRE bit is returned to “0” automatically.
DMC: DSD Mute Control
0: Auto Return (default)
1: Mute Hold (manual return)
This register is only valid when DDM bit = “1”. It selects the mute releasing mode of when the
DSD data level becomes under full-scale after the AK4490EN mutes DSD data by DDM bit
setting.
DMR/DML
This register outputs detection flag when a full scale signal is detected at DSDR/L channel.
DDM: DSD Data Mute
0: Disable (default)
1: Enable
The AK4490EN has an internal mute function that mutes the output when DSD audio data
becomes all “1” or all “0” for 2048 Samples (1/fs). DDM bit controls this function.
015013666-E-01
- 59 -
2015/12