ak4122 AKM Semiconductor, Inc., ak4122 Datasheet - Page 19

• Manufacturer Part Number: ak4122
• Description: 24-bit 96khz Src With Dir
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
(2) PORT2
Four kinds of data formats can be chosen with the IDIF1-0 bits (Table 9). In all modes, the serial data is in MSB first, 2’s
compliment format. If PORT2 is selected the output port, the SDTIO is clocked out on the falling edge of BICK2, and if
PORT2 is selected the input port, the SDTIO is latched on the rising edge of BICK2. The audio interface supports both
master and slave modes. In master mode, BICK2 and LRCK2 are output with the BICK2 frequency fixed to 64fs and the
LRCK2 frequency fixed to 1fs.
MS0267-E-03
Mode
0
1
2
3
LRCK
BICK(64fs)
LRCK
BICK(64fs)
LRCK
BICK(64fs)
IDIF1
SDTI(i)
SDTI(i)
SDTI(i)
0
0
1
1
IDIF0
0
1
0
1
0 1 2
0 1 2
0 1 2
23 22
23:MSB, 0:LSB
23:MSB, 0:LSB
Don't Care
23 22
23:MSB, 0:LSB
24bit, I
24bit, MSB justified
24bit, MSB justified
24bit, MSB justified
Table 9. Audio Interface Format for PORT2
3
Output Format
4 3 2 1
20 21
2
8 9
S Compatible
23
Lch Data
Lch Data
4 3 2 1
21
Lch Data
Figure 3. Mode 1 Timing
Figure 4. Mode 2 Timing
Figure 5. Mode 3 Timing
22 23
22 23
0
8
24
24
24
0
Don't Care
25
- 19 -
Don't Care
1
24bit, I
24bit, MSB justified
31 0 1 2
31 0 1 2
16bit, LSB justified
24bit, LSB justified
0
0 1 2
Input Format
23 22
Don't Care
23 22
2
S Compatible
4
20 21
8 9
4
23
Rch Data
Rch Data
3
21
Rch Data
3
2
22
22
2
1
23
23
LRCK
1
H/L
H/L
L/H
H/L
0
8
24
24
24
0
Don't Care
25
Don't Care
1 0
31
≥ 32fs
≥ 48fs
≥ 48fs
≥ 48fs
31
BICK
0
0
0
23
1
1
1
Default
[AK4122]
2004/08