CS4349
4.3.1
Time-Division Multiplex (TDM) Mode
Four TDM interface modes are available that allow the CS4349 to input stereo PCM data in one of 4 time
“slots”. Figure 14 shows the serial port connections necessary to input 8-channel TDM data into four
CS4349 devices and the corresponding DIF[2:0] pin or register-bit settings required for each CS4349.
Figure 15 shows the TDM data format for each of the four CS4349 devices shown in Figure 14.
.
CS43493
CS43491
CS43494
CS43492
DIF[2:0] = 100
DIF[2:0] = 101
DIF[2:0] = 110
DIF[2:0] = 111
LRCK
ILRCK
LRCK
LRCK
SCLK
SDIN
ISCLK
SDIN
SCLK
SDIN
SCLK
SDIN
LRCK
SCLK TDM_OUT
TDM Source
Figure 14. TDM Mode Connection Diagram
256 clks
LRCK
SCLK
SDIN1
MSB
Slot 1, ch A
MSB
Slot 1, ch B
MSB
Slot 2, ch A
32 clks
MSB
Slot 2, ch B
32 clks
MSB
Slot 3, ch A
32 clks
MSB
Slot 3, ch B
32 clks
MSB
Slot 4, ch A
32 clks
MSB
Slot 4, ch B
32 clks
32 clks
32 clks
Data
zero
MSB
LSB
Figure 15. TDM Mode Timing
20
DS782F1
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