AK4497 Datasheet, PDF (54/98 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[AK4497]
(iii) Daisy Chain
The AK4497 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 25). SDS[2:0]
bits setting will be invalid in Daisy Chain mode.
Table 25 Daisy Chain Control
DCHAIN bit
DCHAIN pin
Mode
TDMO
0
Normal
“L”
1
Daisy Chain Data output
(default)
(1) TDM512 Mode
Figure 42 shows daisy chain connection in TDM512 mode (TDM[1:0] bits = “11”). 16ch data is input to the
SDATA pin of the second AK4497 and the TDMO pin of the second AK4497 is connected to the SDATA
pin of the first AK4497.
Figure 43 shows data input/output example of daisy chain in TDM512 mode. The second AK4497
receives L8 and R8 data as DAC inputs and outputs the data by shifting 2ch from the TDMO pin. The first
AK4497 receives L7 and R7 data as DAC input. Settings of DIF[2:0] bits of the first and second AK4497’s
must be the same.
TDMO
SDATA
First
AK4497
TDMO
SDATA
Second
AK4497
DSP
Figure 42. Daisy Chain (TDM512 Mode)
LRCK
SDATA
TDMO
512 BICK
L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 L7 R7 L8 R8
Second AK4497
L8 R8 L1 R1 L2 ^{R2 L3 R3 L4 R4 L5 R5 L6 R6} L7 R7
Figure 43. Daisy Chain (TDM512 Mode)
First AK4497
Rev. 0.1
- 54 -
2015/11