AK4458VN Datasheet, PDF (39/83 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 8ch Premium DAC

[AK4458]
[1]-2. Daisy Chain
Multiple AK4458s can be connected by Daisy Chain. Daisy Chain mode can be arranged from DCHAIN bit or
DCHAIN pin (Table 15). Daisy Chain supports TDM512/256 mode.
DCHAIN bit
DCHAIN pin
0
1
Mode
TDMO1/2
Normal
input(SDTI3/4) (default)
Daisy Chain output(TDMO1/2)
Table 15. Daisy Chain Control
(1) TDM512 mode
Figure 29 shows example of TDM512 mode Daisy Chain structure (TDM1-0 bits= “11” ). 16ch data is input to
the second AK4458’s SDTI1 pin from a DSP. Connect the second AK4458’s TDMO1 pin to the first
AK4458’s SDTI1 pin. TDMO1 is 8ch shifted data of SDTI1. At TDM512 mode, TDMO2 outputs "L".
Figure 30 shows data I/O example of TDM512 mode. SDTI1 (L5-8, R5-8) data is the input for the DAC of the
second AK4458, and the second AK4458 outputs the data from TDMO1 by shifting 8ch. The first AK4458
accepts SDTI1 (L1-4, R1-4) data as input data of DAC. DIF2-0 bits setting of both first AK4458 and the
second AK4458 must be the same.
TDMO1
TDMO2
SDTI1
SDTI2
First
AK4458
TDMO1
TDMO2
SDTI1
SDTI2
Second
AK4458
DVSS
DSP
Figure 29. Daisy Chain for Two Devices (TDM512 Mode)
LRCK
512 BICK
SDTI1(DSP) ^{L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 L7 R7 L8 R8}
Second AK4458
TDMO1(Second)
L1 R1 L2 R2 L3 R3 L4 R4
First AK4458
Figure 30. Daisy Chain for Two Devices (TDM512 Mode)
014011794-E-00
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2015/01