AK4125_07 Datasheet, PDF (14/26 Pages) Asahi Kasei Microsystems – 192kHz / 24Bit High Performance Asynchronous SRC

[AK4125]
ILRCK
012
IBICK(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 5. Mode 4 Timing
Rch Data
31 0 1
10
■ System Clock & Audio Interface Format for Output PORT
The output port works in master mode or slave mode. The MCLK is not needed in slave mode. The CMODE2-0 pins
select the master/slave and bypass mode. The CMODE2-0 pins should be controlled when the PDN pin = “L”.
The ODIF1-0 pins and OBIT1-0 pins select the audio interface format for the output port. The audio data is MSB first, 2’s
compliment format. The SDTO is clocked out on the falling edge of OBICK. Select the audio interface format when the
PDN pin = “L”. When in BYPASS mode, both IBICK and OBICK are fixed to 64fs.
Mode
0
1
2
3
4
5
6
7
CMODE
2
L
L
L
L
H
H
H
H
CMODE
1
CMODE0
Master / Slave
OMCLK
L
L
Master
256fso
L
H
Master
384fso
H
L
Master
512fso
H
H
Master
768fso
L
L
Slave
Not used. Set to DVSS.
L
H
Master
128fso
H
L
Master
192fso
H
H
Master (Bypass) Not used. Set to DVSS.
Table 3. Master/Slave Control (Output PORT)
fso
8k ∼ 108kHz
8k ∼ 108kHz
8k ∼ 54kHz
8k ∼ 54kHz
8k ∼ 216kHz
8k ∼ 216kHz
8k ∼ 216kHz
8k ∼ 216kHz
Mode ODIF1 ODIF0 SDTO Format
0
L
L
LSB justified
1
L
H
(Reserved)
2
H
L
MSB justified
3
H
H
I²S Compatible
Table 4. Output Audio Interface Format 1 (Output PORT)
Mode Master / Slave
0
1
Slave
CMODE2-0 =
2
“HLL”
3
4
Master
5
Except
6 CMODE2-0 =
7
“HLL”
OBIT1
OBIT0
SDTO
OLRCK
OBICK
OBICK Frequency
MSB justified, I²S LSB justified
L
L
16bit
≥ 32fso
L
H
18bit
Input
Input
H
L
20bit
≥ 36fso
≥ 40fso
64fso
H
H
24bit
≥ 48fso
L
L
16bit
L
H
18bit _{Output Output}
H
L
20bit
64fso
H
H
24bit
Table 5. Output Audio Interface Format 2 (Output PORT)
MS0379-E-04
- 14 -
2007/07