AK4452VN Datasheet, PDF (33/91 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 2ch Premium DAC

[AK4452]
[2] DSD mode
The AK4452 is capable to playback DSD data. The external clocks, which are required to operate the AK4452,
are MCLK and DCLK. MCLK should be synchronized with DCLK but the phase is not critical. The frequency
of MCLK is set by DCKS bit. (Table 9)
After exiting reset (PDN pin = “L” → “H”) upon power-up, the AK4452 is in power-down state until MCLK
and DCLK are input.
DCKS bit
0
1
MCLK Frequency DCLK Frequency
512fs
64fs/128fs/256fs
768fs
64fs/128fs/256fs
Table 9. System Clock (DSD Mode)
(default)
The AK4452 supports 64fs, 128fs and 256fs data stream (fs= 32kHzm 44.1kHz, 48kHz). DSDSELL1-0 bits
control this setting. (Table 10)
DSDSEL1 DSDSEL0
0
0
0
1
1
0
1
1
DSD data stream
fs=32kHz
fs=44.1kHz
2.048MHz
2.8224MHz
4.096MHz
5.6448MHz
8.192MHz
11.2896MHz
Reserved
Reserved
(8.192MHz)
(11.2896MHz)
Table 10. DSD Data Stream Select
fs=48kHz
3.072MHz
6.144MHz
12.288MHz
Reserved
(12.288MHz)
(default)
DSDD bit selects DSD playback mode (Table 11). When DSDD bit= “1”, the output volume control is not
available and the cut off filter value is fixed to 100kHz.
DSDD bit
Mode
0
Full function (default)
1
Volume pass
Table 11. DSD Playback Mode Select
The cut off filter characteristic in DSD mode can be selected by DSDF bit. (Table 12)
DSDF bit Cut Off Filter
0
50kHz
(default)
1
100kHz
Table 12. DSD Filter Select
Rev. 0.1
- 33 -
2014/04