ASAHI KASEI
[AK4140]
Cascade TDM Mode
The AK4140 supports cascading connection of up to four devices in a daisy chain configuration at TDM256 mode. In this
mode, SDTO pin of device #N is connected to TDMIN pin of device #(N+1). The device can output up to 8ch TDM data
multiplexed with TDMIN data. Figure 8 shows a connection example of a daisy chain.
256fs or 512fs
48kHz
MCLK
LRCK
SCLK
AK4140 #1
256fs
TDMIN
SDTO
GND
MCLK
LRCK
SCLK
AK4140 #2
TDMIN
SDTO
(TDMIN of
AK4140 #3)
Figure 9. Cascade TDM Connection Diagram
256 BICK
LRCK
SCLK (256fs)
15 14
0
15 14
0
15 14
#1 SDTO(o)
L #1
32 BICK
R #1
32 BICK
= #2 TDMIN(i)
15 14
0
15 14
0
15 14
0
15 14
0
15 14
15 14
15 14
#2 SDTO(o)
L #2
32 BICK
R #2
32 BICK
L #1
32 BICK
R #1
32 BICK
= #3 TDMIN(i)
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
#3 SDTO(o)
L #3
32 BICK
R #3
32 BICK
L #2
32 BICK
R #2
32 BICK
L #1
32 BICK
R #1
32 BICK
= #4 TDMIN(i)
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
15 14
0
#4 SDTO(o)
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 10. Cascade TDM Timing (4devices)
MS0547-E-01
2007/03
- 17 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
