AK4122 Datasheet, PDF (18/53 Pages) List of Unclassifed Manufacturers – 24 BIT 96KHZ SRC WITH DIR

ASAHI KASEI
[AK4122]
„ Master Mode and Slave Mode
When PORT2 and PORT3 are used as output port, the M/S2 pin and M/S3 pin select either master or slave mode. “H” is
master mode, “L” is slave mode. In master mode, MCLK should be input and the AK4122 outputs BICK and LRCK. In
slave mode, BICK and LRCK are input externally and MCLK is not needed. If PORT2 is used as input port, M/S2 pin
should be set “H” or “L”.
M/S2 pin
L
L
H
H
BYPS bit Data I/O
Mode
BICK, LRCK
0
I/O
Slave, SRC
1
Input
Output
Available
Not Available
Input
0
1
I/O
I/O
Master, SRC
Master, Bypass
Output
Table 6. Master mode/Slave mode for PORT2
M/S3 pin
L
L
H
H
BYPS bit Data I/O
Mode
BICK, LRCK
0
Output
Slave, SRC
Input
1
Output Not Available
0
1
Output
Output
Master, SRC
Master, Bypass
Output
Table 7. Master mode/Slave mode for PORT3
„ Audio Interface Format
The audio interface should be controlled during PWN bit = “0”. When in BYPASS mode, BICK1, BICK2 and BICK are
fixed to 64fs.
(1) PORT1
Four kinds of data formats can be chosen with the DIF1-0 bits (Table 8). In all modes, the serial data is in MSB first, 2’s
compliment format. The SDTI is latched on the rising edge of BICK1. PORT1 corresponds to slave mode only.
Mode
0
1
2
3
DIF1
0
0
1
1
DIF0
Input Format
LRCK BICK
0
16bit, LSB justified H/L ≥ 32fs
1
24bit, MSB justified H/L ≥ 48fs
0
24bit, I²S Compatible L/H ≥ 48fs
1
24bit, LSB justified H/L ≥ 48fs
Table 8. Audio Interface Format for PORT1
Default
Note: The DIF1-0 bits of the PORT1 should be set a value except “10” (I²S Compatible) when the DIR is
selected as an input port.
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 2. Mode 0 Timing
2 10
MS0267-E-02
- 18 -
2004/07