ak4529 AKM Semiconductor, Inc., ak4529 Datasheet - Page 17

• Manufacturer Part Number: ak4529
• Description: High Performance Multi-channel Audio Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n Audio Serial Interface Format
When TDM= “L”, four modes can be selected by the DIF1-0 as shown in table 7. In all modes the serial data is MSB-first,
2’s compliment format. The SDTO is clocked out on the falling edge of BICK and the SDTI/DAUX are latched on the
rising edge of BICK.
Figures 1 4 shows the timing at SDOS = “L”. In this case, the SDTO outputs the ADC output data. When SDOS = “H”,
the data input to DAUX is converted to SDTO’s format and output from SDTO. Mode 2, 3, 6 and 7 in SDTI input formats
can be used for 16-20bit data by zeroing the unused LSBs.
The audio serial interface format becomes the TDM I/F format if TDM pin is set to “H”. In the TDM mode, the serial data
of all DAC (eight channels) is input to the SDTI1 pin. The input data to SDTI2-4 pins is ignored. BICK should be fixed to
256fs. “H” time and “L” time of LRCK should be 1/256fs at least. Four modes can be selected by the DIF1-0 as shown in
table 8. In all modes the serial data is MSB-first, 2’s compliment format. The SDTO is clocked out on the falling edge of
BICK and the SDTI1 are latched on the rising edge of BICK. SDOS and LOOP1-0 should be set to “0” at the TDM mode.
TDM mode cannot be used in double speed mode.
MS0082-E-00
Mode
Mode
0
1
2
3
4
5
6
7
TDM
TDM
0
0
0
0
1
1
1
1
DIF1
DIF1
0
0
1
1
0
0
1
1
DIF0
DIF0
0
1
0
1
0
1
0
1
Table 7. Audio data formats (Normal format)
Table 8. Audio data formats (TDM format)
24bit, Left justified
24bit, Left justified
24bit, Left justified
24bit, I
24bit, Left justified
24bit, Left justified
24bit, Left justified
24bit, I
2
2
SDTO
SDTO
S
S
- 17 -
20bit, Right justified
24bit, Right justified
24bit, Left justified
24bit, I
20bit, Right justified
24bit, Right justified
24bit, Left justified
24bit, I
SDTI1-4, DAUX
SDTI1
2
2
S
S
LRCK
Sync
H/L
H/L
H/L
L/H
BICK
BICK
256fs
256fs
256fs
256fs
48fs
48fs
48fs
48fs
[AK4529]
Default
2001/3