AK4558EN Datasheet, PDF (52/94 Pages) Asahi Kasei Microsystems – 108dB 216kHz 32Bit CODEC with PLL

[AK4558]
■ TDM Cascade Mode
a) ADC
A cascade connection of four AK4558s (max.) is supported in TDM256 mode and two AK4558s (max.) is
supported in TDM128 mode.
(1) TDM256 Mode (Normal or Double speed Mode)
The SDTO pin of device #1, #2, and #3 are connected with the TDMI pin of device #2, #3 and #4,
respectively. It is possible to output 8 channel TDM data from the SDTO pin of device #4 as shown in
Figure 26 and Figure 27.
48kHz, 96kHz
256fs
AK4558 #1
MCKI
TDMI
LRCK
BICK
SDTO
GND
AK4558 #2
MCKI
TDMI
LRCK
BICK
SDTO
AK4558 #3
MCKI
TDMI
LRCK
BICK
SDTO
AK4558 #4
MCKI
TDMI
LRCK
BICK
SDTO
8ch TDM
Figure 26. Cascade TDM256 Connection Diagram
LRCK
256 BICK
BICK(256fs)
#1 SDTO (o) ^{31 30 1 0 31 30 1 0}
31 30
L#1
R#1
32 BICK 32 BICK
#4 TDMI (i)
31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0
L#3
32 BICK
R#3
32 BICK
L#2
32 BICK
R#2
32 BICK
L#1
32 BICK
R#1
32 BICK
31 30
#4 SDTO (o)
31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30 1 0 31 30
L#4
32 BICK
R#4
32 BICK
L#3
32 BICK
R#3
32 BICK
L#2
32 BICK
R#2
32 BICK
L#1
32 BICK
R#1
32 BICK
Figure 27. Cascade TDM Timing (Mode 20; TDM256 mode, MSB justified, Slave mode)
015004500-E-02
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2015/09