[AK5388]
MS1096-E-01 2009/08
- 22 -
■ Cascade TDM Mode
The AK5388 supports cascading of up to two devices in a daisy chain configuration in TDM256 mode. In this mode,
SDTO1 pin of device #1 is connected to TDMIN pin of device #2. The SDTO1 pin of device #2 can output 8-chnnels of
TDM data multiplexed with 4-chnnel of TDM data from device #1 and 4-channel of TDM data from device #2.
Figure 17
shows a connection example of a daisy chain.
When using two AK5388’s in slave mode by cascade connection, the internal timing between device #1 and #2 may differ
for 1MCLK clock cycle. BICK falling edge must me more than ±10ns from a MICK rising edge to prevent this phase
difference between two devices. (
Table 6)
BICK must be divided by two on a MCLK falling edge (
Figure 19) when MCLK=2 x BICK (Normal speed 512fs mode or
Double speed 256fs mode), and BICK must be in-phase signal to MCLK (
Figure 20) when MCLK = BICK (Normal
speed 256fs mode or Quad speed 128fs mode) to achieve this internal timing synchronization.
48kHz
256fs
8ch TDM
LRC
K5388 #1
BIC
TDMIN
SDTO1
SDTO2
MCL
256fs or 512fs
GND
LRC
K5388 #
BIC
TDMIN
SDTO1
SDTO2
MCL
Figure 17. Cascade TDM Connection Diagram
LRCK
BICK(256fs)
#1 SDTO1(o)
22 0
L1
32 BICK
256 BICK
22 0
R1
32 BICK
2223 23 2322 0
L2
32 BICK
22 0
R2
32 BICK
23 23
#1 SDTO2(o)
22 0
L1
32 BICK
22 0
R1
32 BICK
23 23 22 0
L2
32 BICK
22 0
R2
32 BICK
23 23
#2 TDMIN(i)
22 0
L1
32 BICK
22 0
R1
32 BICK
23 23 22 0
L2
32 BICK
22 0
R2
32 BICK
23 23
#2 SDTO1(o)
22 0
L1
32 BICK
22 0
R1
32 BICK
2223 23 2322 0
L2
32 BICK
22 0
R2
32 BICK
23 23 22 0
L1-#1
32 BICK
22 0
R1-#1
32 BICK
23 23 22 0
L2-#1
32 BICK
22 0
R2-#1
32 BICK
23 23
Figure 18. Cascade TDM Timing
