AK4614 Datasheet, PDF (33/69 Pages) Asahi Kasei Microsystems – 6/12-Channel Audio CODEC

[AK4614]
The audio serial interface format in TDM mode is set by the TDM1-0 bits. Five modes can be selected by the DIF2-0 bits
as shown in Table 12. In all modes the serial data is MSB-first, 2’s compliment format. The SDTO1/2 are clocked out on
the rising edge of BICK and the SDTI1/2/3 are latched on the rising edge of BICK. In the TDM512 mode (fs = 48kHz),
the serial data of all ADC (six channels) is output to the SDTO1 pin. SDTO2/3 pins = “L”. And the serial data of all DAC
(twelve channels) is input to the SDTI1 pin. The input data to SDTI2-6 pins are ignored. BICK should be fixed to 512fs.
“H” time and “L” time of LRCK should be 1/512fs at least.
TDM256 mode can be set by TDM1-0 bits as show in Table 13. In the TDM256 mode (fs = 48kHz), the serial data of all
ADC (six channels) is output to the SDTO1 pin. SDTO2/3 pins = “L”. And the serial data of DAC (eight channels; L1,
R1, L2, R2, L3, R3, L4, R4) is input to the SDTI1 pin. Other four data (L5, R5, L6, R6) are input to the SDTI2 pin. The
input data to SDTI3-6 pins are ignored. BICK should be fixed to 256fs. “H” time and “L” time of LRCK should be 1/256fs
at least. TDM128 mode can be set by TDM1-0 bits as show in Table 14.
In TDM128 mode (fs=192kHz), the serial data of four ADC (four channels; L1, R1, L2, R2) is output to the SDTO1 pin.
Other two data (L3, R3) output to the SDTO2. The SDTO3 pin = “L”. And the serial data of DAC (four channels; L1, R1,
L2, R2) is input to the SDTI1 pin and the serial data of DAC (four channels; L3, R3, L4, R4) is input to the SDTI2 pin, the
serial data of DAC (four channels; L5, R5, L6, R6) is input to the SDTI3 pin. The input data to SDTI4-6 pins are ignored.
BICK should be fixed to 128fs. “H” time and “L” time of LRCK should be 1/128fs at least.
Mode M/S TDM1 TDM0 DIF2 DIF1 DIF0 SDTO1-3
10
0
0
11
0
0
12
0
0
13
0
0
14
0
0
15
1
0
16
1
0
17
1
0
18
1
0
19
1
0
1
0
0
0
24bit, Left
justified
1
0
0
1
24bit, Left
justified
1
0
1
0
24bit, Left
justified
1
0
1
1
24bit, Left
justified
1
1
0
0 24bit, I²S
1
0
0
0
24bit, Left
justified
1
0
0
1
24bit, Left
justified
1
0
1
0
24bit, Left
justified
1
0
1
1
24bit, Left
justified
1
1
0
0 24bit, I²S
SDTI1-6
16bit, Right
justified
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I²S
16bit, Right
justified
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I²S
LRCK
I/O
↑
I
↑
I
↑
I
↑
I
↓
I
↑
O
↑
O
↑
O
↑
O
↓
O
BICK
I/O
512fs I
512fs I
512fs I
512fs I
512fs I
512fs O
512fs O
512fs O
512fs O
512fs O
Table 12. Audio data formats (TDM512 mode)
MS1025-E-00
- 33 -
2008/10