AK4104_10 Datasheet, PDF (11/21 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit 3.3V DIT

[AK4104]
■ Audio Interface Format
Data is shifted in via the SDTI pin using BICK and LRCK inputs. The DIF1-0 bits as shown in Table 2 can select four
serial data modes. In all modes the serial data is MSB-first, 2’s compliment format and is latched on the rising edge of
BICK. Mode 3 can be used for 16bit I²S Compatible format by zeroing the unused LSBs at BICK ≥ 48fs or BICK = 32fs.
Mode
0
1
2
3
DIF1
0
0
1
1
DIF0
SDTI Format
0
16bit, LSB justified
1
24bit, LSB justified
0
24bit, MSB justified
1
16/24bit, I²S Compatible
Table 2. Audio Interface Format
BICK
≥ 32fs
≥ 48fs
≥ 48fs
≥ 48fs or 32fs
Figure
Figure 10
Figure 11
Figure 12
Figure 13
LRCK
0123
BICK(32fs)
9 10 11 12 13 14 15 0 1 2 3
9 10 11 12 13 14 15 0 1
SDTI(i)
15 14 13
7 6 5 4 3 2 1 0 15 14 13
7 6 5 4 3 2 1 0 15
0123
BICK(64fs)
17 18 19 20
31 0 1 2 3
17 18 19 20
31 0 1
SDTI(i)
Don't Care 15 14 13 12
SDTI-15:MSB, 0:LSB
1 0 Don't Care 15 14 13 12
Lch Data
Rch Data
Figure 10. Mode 0 Timing
210
LRCK
012
BICK(64fs)
89
24
31 0 1 2
89
24
SDTI(i)
Don't Care 23
8
23:MSB, 0:LSB
1 0 Don't Care 23
8
Lch Data
Figure 11. Mode 1 Timing
Rch Data
31 0 1
10
LRCK
012
BICK(64fs)
20 21 22 23 24
31 0 1 2
SDTI(i)
23 22
4 3 2 1 0 Don't Care 23 22
23:MSB, 0:LSB
Lch Data
Figure 12. Mode 2 Timing
20 21 22 23 24
31 0 1
4 3 2 1 0 Don't Care 23
Rch Data
MS0642-E-01
- 11 -
2010/09