AK4495EQ Datasheet, PDF (35/63 Pages) Asahi Kasei Microsystems – Quality-oriented Premium 32-Bit 2ch DAC

[AK4495S/95]
[3] External Digital Filter Mode (EX DF I/F Mode)
DW indicates the number of BCK in one WCK cycle. The audio data is input by MCLK, BCK and WCK from
the DINL and DINR pins. Three formats are available (Table 20) by DIF2-0 bits setting. The data is latched on
the rising edge of BCK. The BCK and MCLK clocks must be the same frequency and must not burst. BCK and
MCLK frequencies for each sampling speed are shown in Table 19.
Sampling
Speed[kHz]
MCLK&BCK [MHz]
256fs 384fs 512fs 768fs
WCK
ECS
768
(432-864)
N/A
N/A 24.576 36.864 16fs
32
48
DW
0 (default)
384
12.288 18.432 24.576 36.864 8fs
(216-432)
32
48
64
96
DW
1
Table 19 System Clock Example (EX DF I/F mode) (N/A: Not available)
Mode DIF2 DIF1 DIF0
Input Format
0
0
0
0 16-bit LSB justified
1
0
0
1
N/A
2
0
1
0
N/A
3
0
1
1
N/A
4
1
0
0 24-bit LSB justified
5
1
0
1 32-bit LSB justified (default)
6
1
1
0
N/A
7
1
1
1
N/A
Table 20 Audio Interface Format (EX DF I/F mode) (N/A: Not available)
1/16fs or 1/8fs or 1/4fs or 1/2fs
WCK
BCK
01
8 9 10 11
16 17
26 27 28 29 30 31 0 1
DINL or
DINR
BCK
DINL or
DINR
BCK
DINL or
DINR
31 30
01
24 23 22 21 20 17 16 15 14
5678
47 48 49
Don’t care
01
Don’t care
5678
Don’t care
23 24 25
Don’t care
Don’t care
Don’t care
654 321 0
65
92 93 94 95 0 1
31
17
3 2 1 0 Don’t care
44 45 46 47 0 1
31
3 2 1 0 Don’t care
Figure 17 EX DF I/F Mode Timing
MS1560-E-02
- 35 -
2014/04