ak4358 AKM Semiconductor, Inc., ak4358 Datasheet - Page 15

• Manufacturer Part Number: ak4358
• Description: 192khz 24-bit 8ch Dac With Dsd Input
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
1) PCM Mode
When PCM mode, data is shifted in via the SDTI1-4 pins using BICK and LRCK inputs. The DIF0-2 as shown in Table
10 can select five serial data modes. Initial value of DIF0-2 bits is “010” and DIF0 bit is ORed with DIF0 pin. In all
modes the serial data is MSB-first, 2’s compliment format and is latched on the rising edge of BICK. Mode 2 can be used
for 16/20 MSB justified formats by zeroing the unused LSBs.
When TDM0 = “1”, the audio interface becomes TDM mode. In TDM256 mode (TDM1 = “0”, Table 11), 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 3/256fs at least. The serial data is MSB-first, 2’s compliment format.
The input data to SDTI1 pin is latched on the rising edge of BICK. In TDM128 mode (TDM1 = “1”, Table 12), the serial
data of DAC (four channels; L1, R1, L2, R2) is input to the SDTI1 pin. Other four data (L3, R3, L4, R4) is input to the
SDTI2. The input data to SDTI3-4 pins is ignored. BICK should be fixed to 128fs.
MS0203-E-01
Audio Serial Interface Format
SDTI
LRCK
BICK
(32fs)
BICK
(64fs)
SDTI
Mode 0
Mode 0
Mode
0
1
2
3
4
TDM1
0
0
0
0
0
0
0
Don’t care
15:MSB, 0:LSB
15
1
1
14
TDM0
0
0
0
0
0
6
DIF2
Lch Data
10
14
0
0
0
0
1
Table 10. Audio Data Formats (Normal mode)
5
11
15
4
Table 9. System Clock (fs=44.1kHz)
DCKS
MCLK
DCLK
DIF1
12
16
0
0
1
1
0
15 14
3
Figure 1. Mode 0 Timing
13
17
2
DIF0 SDTI Format
14
0
1
0
1
0
1
15
31
- 15 -
512fs
64fs
16bit LSB Justified
20bit LSB Justified
24bit MSB Justified
24bit I
24bit LSB Justified
0
0
0
0
0
Don’t care
15 14
2
1
S Compatible
1
768fs
64fs
1
6
10
14
Rch Data
5
LRCK
11
15
H/L
H/L
H/L
L/H
H/L
4
12
16
15 14
3
BICK
13
≥ 32fs
≥ 40fs
≥ 48fs
≥ 48fs
≥ 48fs
17
2
14
1
Figure 1
Figure 2
Figure 3
Figure 4
Figure 2
15
31
Figure
0
0
0
0
15
[AK4358]
1
2006/02
1
14
Default