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参数资料
| 型号： | AK4112B |
| 厂商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | HIGH FEATURE 96kHz 24BIT DIR |
| 中文描述： | 特写96kHz的24位高迪尔 |
| 文件页数： | 10/30页 |
| 文件大小： | 334K |
| 代理商： | AK4112B |
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ASAHI KASEI
[AK4112B]
MS0078-E-02
2004/04
- 18 -
Audio Serial Interface Format
The DIF0, DIF1 and DIF2 pins as shown in Table 13 can select eight serial data formats. In all formats the serial data is
MSB-first, 2's compliment format. The SDTO is clocked out on the falling edge of BICK and the DAUX is latched on
the rising edge of BICK. BICK outputs 64fs clock in Mode 0-5. Mode 6-7 are Slave Modes, and BICK is available up to
128fs at fs=48kHz. In the format equal or less than 20bit (Mode0-2), LSBs in sub-frame are truncated. In Mode 3-7, the
last 4LSBs are auxiliary data (see Figure 5).
When the Parity Error, Biphase Error or Frame Length Error occurs in a sub-frame, AK4112B continues to output the
last normal sub-frame data from SDTO repeatedly until the error is removed. When the Unlock Error occurs, AK4112B
output “0” from SDTO. In case of using DAUX pin, the data is transformed and output from SDTO. DAUX pin is used
in Clock Operation Mode 1, 3 and unlock state of Mode 2.
The input data format to DAUX should be left justified except in Mode5 and 7(Table 13). In Mode5 or 7, both the input
data format of DAUX and output data format of SDTO are I
2S. Mode6 and 7 are Slave Mode that is corresponding to the
Master Mode of Mode4 and 5. In salve Mode, LRCK and BICK should be fed with synchronizing to MCKO1/2.
The initial state of the audio format is the Master Mode upon the power-up. Therefore, if the audio format is changed to
the Slave Mode after power-up, the setting of the external clocks should be careful until completing to set the control
registers.
0
34
7 811 12
27 28 29 30 31
preamble
Aux.
LSB
MSB
VU C P
sub-frame of IEC958
0
23
AK4112B Audio Data (MSB First)
LSB
MSB
Figure 5. Bit configuration
LRCK
BICK
Mode
DIF2
DIF1
DIF0
DAUX
SDTO
I/O
0
24bit, Left justified
16bit, Right justified
H/L
O
64fs
O
1
0
1
24bit, Left justified
18bit, Right justified
H/L
O
64fs
O
2
0
1
0
24bit, Left justified
20bit, Right justified
H/L
O
64fs
O
3
0
1
24bit, Left justified
24bit, Right justified
H/L
O
64fs
O
4
1
0
24bit, Left justified
H/L
O
64fs
O
Default
5
1
0
1
24bit, I
2S
24bit, I
2S
L/H
O
64fs
O
6
1
0
24bit, Left justified
H/L
I
64-128fs
I
7
1
24bit, I
2S
24bit, I
2S
L/H
I
64-128fs
I
Table 13. Audio data format
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