AK4458VN Datasheet, PDF (41/83 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 8ch Premium DAC

[AK4458]
(2) TDM256 mode
Figure 33 shows example of TDM256 mode Daisy Chain structure (TDM1-0 bits= “10” ). 16ch data is input to
the second AK4458’s SDTI1/2 pin from a DSP. Connect the second AK4458’s TDMO1/2 pin to the first
AK4458’s SDTI1/2 pin. TDMO1/2 are 4ch shifted data of SDTI1/2.
Figure 34 shows data I/O example of TDM256 mode. SDTI1 (L3-4, R3-4) and SDTI2 (L7-8, R7-8) data is the
input for the DAC of the second AK4458, and the second AK4458 outputs the data from TDMO1/2 by shifting
4ch. The first AK4458 accepts SDTI1 (L1-2, R1-2) and SDTI2 (L5-6, R5-6) 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
DSP
Figure 33. Daisy Chain (TDM256 Mode)
LRCK
SDTI1
256 BICK
L1
R1
L2
R2
L3
R3
L4
R4
Second AK4458
TDMO1
SDTI2
L5
R5
L6
L1
R1
L2
R2
First AK4458
R6
L7
R7
L8
R8
Second AK4458
TDMO2
L5
R5
L6
R6
First AK4458
Figure 34. Daisy Chain (TDM256 Mode)
Note 34. When the total number of connected channel is more than sixteen, exceeded channel data that are over
16ch are output from the last data of a 16ch signal output from the DSP in the same order.
014011794-E-00
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2015/01