AK4122A Datasheet, PDF (21/54 Pages) Asahi Kasei Microsystems – 24-Bit 96kHz SRC with DIR

[AK4122A]
LRCK
0123
BICK(64fs)
SDTIO(o)
23 22
21 22 23 24 25
4 3 21 0
012
23 22
SDTIO(i)
23 22
4 3 2 1 0 Don't Care 23 22
23:MSB, 0:LSB
Lch Data
Figure 8. Mode 2 Timing
21 22 23 24 25
01
4 32 1 0
4 3 2 1 0 Don't Care
Rch Data
LRCK
012
BICK(64fs)
89
24
SDTIO(o) ^{23 22}
16 15
0
31 0 1 2
89
24
23 22
16 15
0
31 0 1
23
SDTIO(i)
Don't Care 23
8
1 0 Don't Care 23
8
10
23:MSB, 0:LSB
Lch Data
Figure 9. Mode 3 Timing
Rch Data
(3) PORT3
Two kinds of data formats are available and are selected by setting the ODIF bit (Table 10). In both modes, the serial data
is in MSB first, 2’s compliment format. The SDTO is clocked out on the falling edge of BICK. The audio interface
supports both master and slave modes. In master mode, BICK output is fixed to 64fs and LRCK output is fixed to 1fs.
Mode
0
1
ODIF
Output Format
LRCK BICK
0 24bit, MSB justified
1 24bit, I²S Compatible
H/L ≥ 48fs
L/H ≥ 48fs
Table 10. Audio Interface Format for PORT3
(default)
LRCK
0123
BICK(64fs)
17 18 19 20
31 0 1 2 3
SDTO(o)
23 22 21
7 6 54 3
23 22 21
SDTO-23:MSB, 0:LSB
Lch Data
Figure 10. Mode 0 Timing
17 18 19 20
7 65 4 3
Rch Data
31 0 1
23
LRCK
0123
BICK(64fs)
21 22 23 24 25
012
21 22 23 24 25
01
SDTO(o)
23 22
4 3 21 0
23 22
23:MSB, 0:LSB
Lch Data
Figure 11. Mode 1 Timing
4 32 1 0
Rch Data
MS1076-E-01
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2010/05