[AK4492]
[3] External Digital Filter Mode (EXDF Mode)
The audio data is input by BCK and WCK from the DINL and DINR pins. Three formats are available
(Table 27) by DIF2-0 bits setting. The data is latched on the rising edge of BCK. The BCK and MCLK
clocks must not burst.
Table 27. Audio Interface Format (EXDF Mode)
Mode DIF2
DIF1
DIF0
Input Format
16-bit LSB justified
N/A
16-bit LSB justified
N/A
24-bit LSB justified
32-bit LSB justified
24-bit LSB justified
32-bit LSB justified
0
1
2
3
4
5
6
7
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
(default)
(N/A: Not available)
1/16fs or 1/8fs or 1/4fs or 1/2fs
WCK
BCK
0
1
8
9
10
11
16
17
26
27
28
29
30
31
0
1
DINL or
DINR
31 30
24
23 22 21 20 17 16 15 14
6
5
4
3
2
1
0
65
92
93
94
1
0
5
6
7
8
47
48
49
95
0
1
BCK
DINL or
DINR
Don’t care
Don’t care
Don’t care
31
2
2
1
1
3
3
0
0
Don’t care
44
45
46
0
1
13
14
15
16
23
24
25
47
0
1
BCK
DINL or
DINR
Don’t care
Don’t care
Don’t care
31
Figure 49. EXDF Mode Timing
016011073-E-00
2016/12
- 60 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
