[AK4492]
(3) Daisy Chain
The AK4492 supports cascading of multiple devices by daisy chain connection in TDM512/256 mode
(TDM[1:0] bits = “10”, “11”). DCHAIN bit or DCHAIN pin controls Daisy Chain mode (Table 26). SDS[2:0]
bits setting will be invalid in Daisy Chain mode.
Table 26. Daisy Chain Control
DCHAIN bit
Mode
TDMO pin
DCHAIN pin
0
1
Normal
Daisy Chain
L
(default)
Data output
(3)-1. TDM512 Mode
Figure 45 shows daisy chain connection in TDM512 mode (TDM[1:0] bits = “11”). 16ch data is input to the
SDATA pin of the second AK4492 and the TDMO pin of the second AK4492 is connected to the SDATA
pin of the first AK4492.
Figure 46 shows data input/output example of daisy chain in TDM512 mode. The second AK4492
receives L8 and R8 data as DAC inputs and outputs the data by shifting 2ch from the TDMO pin. The first
AK4492 receives L7 and R7 data as DAC input. Settings of DIF[2:0] bits of the first and second AK4492’s
must be the same.
TDMO
SDATA
TDMO
SDATA
DSP
First
Second
AK4492
AK4492
Figure 45. Daisy Chain (TDM512 Mode)
512 BICK
LRCK
R5 L6 R6 L7 R7
L1 R1 L2 R2
L8 R8
L3 R3 L4 R4
L5
SDATA
Second AK4492
R2 L3 R3
L4 R4 L5 R5 L6 R6
R1 L2
TDMO
R8
L8
L1
L7 R7
First AK4492
Figure 46. Daisy Chain (TDM512 Mode)
016011073-E-00
2016/12
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AKM [ ASAHI KASEI MICROSYSTEMS ]
